When i was making an Account, i tried to make one called HTF Flippy, but it said it was taken, i wnt on to User:HTF Flippy and it wasn't taken.
It appears this account was created and banned from chat. Obviously due to vandalism or spamming. This is why you can't create an account with that name, it already exists.
It says (A Wikia Contributor)
User:HTF flippy exists, however
User:HTF Flippy is not taken.
What do you think?