when a girl uses her boobs to slap you in the face (must be a DD or bigger to work)
"jo's boobs were so big that they made red marks on your face after the boob slap"

by goddambats May 27, 2006
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when two females hug and their breasts meet before their arms
THWAP.
"What the hell?"
"Oh...sorry I didn't mean to boob slap you"
by fashionfreak March 4, 2009
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slapping the boobs, instead of butt slap and high fives.
Livia gave Addy a boob slap, and Addy screamed.
by Emma Dohorichik May 1, 2009
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You Shall Slap Them Titties Til They Go Red. But only once

28th October
Its Boob Slap Day! *slap*
by TheDailyDaily October 2, 2020
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