To be an ass monkey is to be or act totally stupid. This includes people who are total idiots.
Hilbert: Nate's such an ass monkey.
Hilda: I know right?
n. an extremely rude/demanding bride-to-be. basically a bitch turned up to eleven.
Raika: I want this champagne here and I want it in the next fifteen minutes or that's your ass!
Annabelle: Hear that guys? Bridezilla wants some champagne in the next fifteen minutes! The store's almost 20 minutes away though.