diff --git a/didier/cogs/discord.py b/didier/cogs/discord.py
index df91673..7418994 100644
--- a/didier/cogs/discord.py
+++ b/didier/cogs/discord.py
@@ -63,20 +63,12 @@ class Discord(commands.Cog):
         return await ctx.reply(f"{name or 'Your'} birthday is set to **{day}/{month}**.", mention_author=False)
 
     @birthday.command(name="set", aliases=["config"])
-    async def birthday_set(self, ctx: commands.Context, day: str, user: Optional[discord.User] = None):
+    async def birthday_set(self, ctx: commands.Context, day: str):
         """Set your birthday to `day`.
 
         Parsing of the `day`-argument happens in the following order: `DD/MM/YYYY`, `DD/MM/YY`, `DD/MM`.
         Other formats will not be accepted.
         """
-        # Let owners set other people's birthdays
-        if user is not None and not await self.client.is_owner(ctx.author):
-            return await ctx.reply("You don't have permission to set other people's birthdays.", mention_author=False)
-
-        # For regular users: default to your own birthday
-        if user is None:
-            user = ctx.author
-
         try:
             default_year = 2001
             date = str_to_date(day, formats=["%d/%m/%Y", "%d/%m/%y", "%d/%m"])
@@ -89,7 +81,7 @@ class Discord(commands.Cog):
             return await ctx.reply(f"`{day}` is not a valid date.", mention_author=False)
 
         async with self.client.postgres_session as session:
-            await birthdays.add_birthday(session, user.id, date)
+            await birthdays.add_birthday(session, ctx.author.id, date)
             await self.client.confirm_message(ctx.message)
 
     @commands.group(name="bookmark", aliases=["bm", "bookmarks"], case_insensitive=True, invoke_without_command=True)
diff --git a/didier/cogs/fun.py b/didier/cogs/fun.py
index 6a89833..98a86d6 100644
--- a/didier/cogs/fun.py
+++ b/didier/cogs/fun.py
@@ -102,7 +102,8 @@ class Fun(commands.Cog):
     async def memegen_preview_msg(self, ctx: commands.Context, template: str):
         """Generate a preview for the meme template `template`, to see how the fields are structured."""
         async with ctx.typing():
-            meme = await self._do_generate_meme(template, [])
+            fields = [f"Field #{i + 1}" for i in range(20)]
+            meme = await self._do_generate_meme(template, fields)
             return await ctx.reply(meme, mention_author=False)
 
     @memes_slash.command(name="generate")
@@ -118,9 +119,10 @@ class Fun(commands.Cog):
     @app_commands.describe(template="The meme template to use in the preview.")
     async def memegen_preview_slash(self, interaction: discord.Interaction, template: str):
         """Generate a preview for a meme, to see how the fields are structured."""
-        await interaction.response.defer(ephemeral=True)
+        await interaction.response.defer()
 
-        meme_url = await self._do_generate_meme(template, [])
+        fields = [f"Field #{i + 1}" for i in range(20)]
+        meme_url = await self._do_generate_meme(template, fields)
 
         await interaction.followup.send(meme_url, ephemeral=True)
 
diff --git a/didier/data/apis/imgflip.py b/didier/data/apis/imgflip.py
index 416e22c..c44eea6 100644
--- a/didier/data/apis/imgflip.py
+++ b/didier/data/apis/imgflip.py
@@ -10,10 +10,6 @@ __all__ = ["generate_meme"]
 
 def generate_boxes(meme: MemeTemplate, fields: list[str]) -> list[str]:
     """Generate the template boxes for Imgflip"""
-    # If no fields were passed, generate a template instead
-    if not fields:
-        fields = [f"Field #{i + 1}" for i in range(meme.field_count)]
-
     # If a meme only has 1 field, join all the arguments together into one string
     if meme.field_count == 1:
         fields = [" ".join(fields)]
diff --git a/didier/data/embeds/error_embed.py b/didier/data/embeds/error_embed.py
index ea03bfe..70bc2d3 100644
--- a/didier/data/embeds/error_embed.py
+++ b/didier/data/embeds/error_embed.py
@@ -20,7 +20,7 @@ def _get_traceback(exception: Exception) -> str:
             break
 
         # Escape Discord Markdown formatting
-        error_string += line
+        error_string += line.replace(r"*", r"\*").replace(r"_", r"\_")
         if line.strip():
             error_string += "\n"
 
@@ -45,12 +45,7 @@ def create_error_embed(ctx: Optional[commands.Context], exception: Exception) ->
 
         invocation = f"{ctx.author.display_name} in {origin}"
 
-        if ctx.interaction is not None and ctx.interaction.command is not None:
-            command = ctx.interaction.command.name
-        else:
-            command = ctx.message.content or "N/A"
-
-        embed.add_field(name="Command", value=command, inline=True)
+        embed.add_field(name="Command", value=f"{ctx.message.content}", inline=True)
         embed.add_field(name="Context", value=invocation, inline=True)
 
     if message:
diff --git a/didier/data/embeds/schedules.py b/didier/data/embeds/schedules.py
index ef829cf..98a7a51 100644
--- a/didier/data/embeds/schedules.py
+++ b/didier/data/embeds/schedules.py
@@ -52,7 +52,7 @@ class Schedule(EmbedBaseModel):
         if not self.slots:
             return Schedule()
 
-        personal_slots = []
+        personal_slots = set()
         for slot in self.slots:
             alt_id = slot.alternative_overarching_role_id
 
@@ -65,9 +65,24 @@ class Schedule(EmbedBaseModel):
                 alt_id is not None and alt_id in roles
             )
             if role_found or overarching_role_found:
-                personal_slots.append(slot)
+                personal_slots.add(slot)
 
-        return Schedule(set(personal_slots))
+        return Schedule(personal_slots)
+
+    def simplify(self):
+        """Merge sequential slots in the same location into one
+
+        Note: this is done in-place instead of returning a new schedule!
+        (The operation is O(n^2))
+
+        Example:
+            13:00 - 14:30: AD3 in S9
+            14:30 - 1600: AD3 in S9
+        """
+        for first in self.slots:
+            for second in self.slots:
+                if first == second:
+                    continue
 
     @overrides
     def to_embed(self, **kwargs) -> discord.Embed:
@@ -116,11 +131,9 @@ class ScheduleSlot:
     def __post_init__(self):
         """Fix some properties to display more nicely"""
         # Re-format the location data
-        match = re.search(r"(.*)\. (?:Gebouw )?(.*)\. (?:Campus )?(.*)\. ", self.location)
-        if match is not None:
-            room, building, campus = match.groups()
-            room = room.replace("PC / laptoplokaal ", "PC-lokaal")
-            self.location = f"{campus} {building} {room}"
+        room, building, campus = re.search(r"(.*)\. (?:Gebouw )?(.*)\. (?:Campus )?(.*)\. ", self.location).groups()
+        room = room.replace("PC / laptoplokaal ", "PC-lokaal")
+        self.location = f"{campus} {building} {room}"
 
         # The same course can only start once at the same moment,
         # so this is guaranteed to be unique
@@ -164,8 +177,7 @@ class ScheduleSlot:
             return False
 
         if self.start_time == other.end_time:
-            self.start_time = other.start_time
-            self._hash = hash(f"{self.course.course_id} {str(self.start_time)}")
+            other.end_time = self.end_time
             return True
         elif self.end_time == other.start_time:
             self.end_time = other.end_time
@@ -222,7 +234,7 @@ async def parse_schedule_from_content(content: str, *, database_session: AsyncSe
     calendar = Calendar(content)
     events = list(calendar.events)
     course_codes: dict[str, UforaCourse] = {}
-    slots: list[ScheduleSlot] = []
+    slots: set[ScheduleSlot] = set()
 
     for event in events:
         code = parse_course_code(event.name)
@@ -248,10 +260,9 @@ async def parse_schedule_from_content(content: str, *, database_session: AsyncSe
         if any(s.could_merge_with(slot) for s in slots):
             continue
 
-        slots.append(slot)
+        slots.add(slot)
 
-    # Cast to set at the END because the __hash__ can change while merging with others
-    return Schedule(slots=set(slots))
+    return Schedule(slots=slots)
 
 
 async def parse_schedule(name: ScheduleType, *, database_session: AsyncSession) -> Optional[Schedule]:
diff --git a/didier/didier.py b/didier/didier.py
index 06db727..0d1671c 100644
--- a/didier/didier.py
+++ b/didier/didier.py
@@ -215,14 +215,9 @@ class Didier(commands.Bot):
         if not message.content.startswith(settings.DISCORD_CUSTOM_COMMAND_PREFIX):
             return False
 
-        # Remove the prefix
-        content = message.content[len(settings.DISCORD_CUSTOM_COMMAND_PREFIX) :].strip()
-
-        # Message was just "?" (or whatever the prefix was configured to)
-        if not content:
-            return False
-
         async with self.postgres_session as session:
+            # Remove the prefix
+            content = message.content[len(settings.DISCORD_CUSTOM_COMMAND_PREFIX) :]
             command = await custom_commands.get_command(session, content)
 
             # Command found
diff --git a/didier/menus/common.py b/didier/menus/common.py
index 3b893da..45b0d95 100644
--- a/didier/menus/common.py
+++ b/didier/menus/common.py
@@ -169,7 +169,7 @@ class PageSource(ABC, Generic[T]):
 
     def get_page_data(self, page: int) -> list[T]:
         """Get the chunk of the dataset for page [page]"""
-        return self.dataset[page * self.per_page : (page + 1) * self.per_page]
+        return self.dataset[page : page + self.per_page]
 
     async def start(self, *, ephemeral: bool = False, timeout: Optional[int] = None) -> Menu:
         """Shortcut to creating (and starting) a Menu with this source
diff --git a/settings.py b/settings.py
index aa0f6fe..9e36f1f 100644
--- a/settings.py
+++ b/settings.py
@@ -29,6 +29,7 @@ __all__ = [
     "DISCORD_CUSTOM_COMMAND_PREFIX",
     "UFORA_ANNOUNCEMENTS_CHANNEL",
     "UFORA_RSS_TOKEN",
+    "URBAN_DICTIONARY_TOKEN",
     "IMGFLIP_NAME",
     "IMGFLIP_PASSWORD",
     "ScheduleType",
@@ -76,6 +77,7 @@ MA_CS_ENG_2_ROLE: Optional[int] = env.int("MA_CS_ENG_2_ROLE", 102330043480016491
 
 """API Keys"""
 UFORA_RSS_TOKEN: Optional[str] = env.str("UFORA_RSS_TOKEN", None)
+URBAN_DICTIONARY_TOKEN: Optional[str] = env.str("URBAN_DICTIONARY_TOKEN", None)
 IMGFLIP_NAME: Optional[str] = env.str("IMGFLIP_NAME", None)
 IMGFLIP_PASSWORD: Optional[str] = env.str("IMGFLIP_PASSWORD", None)