From the verb phrase cut up.
cutup (plural cutups)
- Someone who cuts up; someone who acts boisterously or clownishly, for example, by playing practical jokes
2009 January 25, Marilyn Stasio, “A Need for Noir”, in New York Times:
- Although Dek can be a cutup, his explanation for his obsessive search for the truth — “It was about respect” — reveals the bedrock of decency that makes him a seriously good guy.