A sexual act in which a male chews up Captain Crunch cereal, spits it on a woman's chest, and then ejaculates onto it. It refers to the sweaters worn by Bill Cosby.
Person A: Did you do anything freaky with her last night?
Person B: Yeah man. I kept her warm with a Frothy Cosby.
Person B: Yeah man. I kept her warm with a Frothy Cosby.
by Kama Sutra May 7, 2016