Twirl is one of the many emotes available for all players. It is automatically awarded to a character when they create an account. This emote will make the player spin around in a circle once. It is used in a couple of clue scrolls.
After the Custom Cursors update, when the player moved the cursor over the 'Spin' emote, it would show a pot. This is because this update uses the name of the action, rather than the action itself, to identify the image to portray. In this case, the word 'spin' is also used in crafting, when the player spins a clay pot. This was fixed by renaming the emote 'Twirl'.