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1 definition by poloe

 
1.
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!
by poloe December 03, 2012