Dumb Mama

Listen here, Joe. You think you're a comedian, huh? You're the type of person who probably wears socks with sandals, and you don't know the difference between a rhombus and a rectangle. It's a 'yo mama' joke, and the punchline is about how dumb her mom is. This kind of humor is like watching a squirrel try to bury a nut in concrete. The joke is based on the stereotype of someone being extremely stupid.