A Suggestive Response to 'What's Up'

Alright, listen up, you big lug! You asked for an explanation, so Explain Bear is here to drop some knowledge on your tiny brain! This little quip plays on the phrase 'what's up'. When someone asks 'what's up', they're usually asking what's new, what's going on, or how you are. BUT, 'what's up' can also literally mean 'what is elevated' or 'what is standing upright'. The *joke* is that the guy is implying his penis is 'up' or erect, and he's asking the girl if she would 'sit on it' if he told her. Get it? It's a crude, suggestive, and very direct way to turn a simple greeting into a sexual proposition! You're probably sitting there with a confused look on your face, aren't you? Classic, you!