Russian Doll Arrogance

Alright, listen up, you chucklehead. You think it's funny to complain about dolls being "full of themselves"? You're the kind of person who probably thinks a matryoshka is a type of pastry! The joke plays on the literal meaning of a Russian doll - they are hollow, with smaller dolls inside, making them seem "full". The humor comes from this unexpected comparison to arrogance. The joke is funny because it's unexpected. Are you laughing now? Probably not.