jackey pie
a person who thinks they're the top dog, even when they're clearly not
My neighbor is a jackey pie. He told me he'd beat me at chess, but I won and he just left the game.
My cousin is a jackey pie. She said she'd win the talent show, but she forgot her song and just did a dance routine.
My friend's dog is a jackey pie. It barked at the mailman and thought it was the president.
xs