What goes around CUMS around
When a man is receiving oral sex from a woman, the woman pretends to swallow his jizz load but instead spits it back in the mans face (or spits the jizz into her own hand and slaps him in the face).
D'Angelo: Yo, I was gettin head from this bitch the other day and she usually swallows, this time she spit my cum in her hand and gave me a WHAT GOES AROUND CUMS AROUND, it was messed up!
What Goes Around Cums Around
When your mom brings a guy home and you fuck the guy after, receiving her sloppy seconds.
Random Guy: just got finished with your mom. who's down for round 2?
You: What Goes Around Cums Around i guess.
You: What Goes Around Cums Around i guess.