Top Definition
this is when a guy or a girl or a shemale rubs there hand in an upward then downward motion surrounding their cock. this will eventually lead to cum, or sperm coming out of the penis head, making a big mess to clean up.
My big ass Ejaculat!on left a mess all over the bathroom mirror, so i left it there. then my mom walked in and said "who the hell let a shower of sperm on my godamn mirror."
by SKNI99A November 16, 2007
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