The Unicorns were minor villains who appeared in the animated TV series Regular Show. The Unicorns constantly call themselves "Bros", and they say "Bros" a lot.
They first appear in the episode "The Unicorns Have Got to Go", when they get attracted by a body spray used by Mordecai. Rigby thinks them as being cool and decides to hang out with them. They take advantage of Mordecai and lead him to abandon Rigby. They soon mess up the place, tie up Benson and eat his gumballs, as well as betraying Rigby and farting in his face. Mordecai and Rigby soon challenge the Unicorns to a race as an attempt to get rid of them. Benson presses a button on a remote that makes the Unicorns and their racing cart explode, as this was the only way to get rid of them.
The unicorns appear again in House Rules. After Mordecai and Rigby are sent to a place without rules, the Unicorns try to kill Mordecai and Rigby as revenge for getting rid of them and because they tried to tell them rules. Mordecai reads Benson's rule book and reads a rule saying "No Unicorns", once again killing the Unicorns.