A term used to describe the intentional and un-nessecary exposure of the top half of the vagina. On rare occasions, the word can be used to described the exposure of the lower half, but that is uncommon except in the case of whores. (Not to be confused with camel toe.)
"Dude, did you see those pictures of that whore on facebook?" "Yeah , she had way to much clea-vag-e. How am i supposed to introduce that to my mother?"
the game of throwing small objects, such as little balls of paper, inside a girls shirt with the goal of getting it to go in between her boobs.
Bryan: Look at Jessica over there. I'm going to play cleavageball! I'm gonna throw this paper ball inside her shirt.
Barney: You are going to miss! She doesn't have anything!