the act by which a person ejaculates on their hand and proceeds to slams the contents onto the victims face, and hold for no less than 3 seconds. This act may or may not result in the victim falling down in dismay. Not to be mistaken for cum slap
After refusing to cease distubing the audience at a movie theater, an individual procedes to go to the bathroom and crank one out in his hand, at which time he returns and cum slams the cinematic perpetrator so fiercely that the victim can't walk for two weeks.
by millertime0009 April 19, 2006

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