o'weener
An o'weener is an adult who still wants to be a kid. They’re like the kid who still asks for extra snacks at the movie theater.
My aunt dressed as a dragon and got candy from kids who thought she was a real monster.
My uncle wore a pirate costume and got yelled at by a kid who thought he was a real pirate.
My cousin dressed as a zombie and got candy from a kid who screamed and ran away.