1 definition by SMBKRTan

Top Definition
To ejaculate on the lower part of the back after performing doggy style, mop up the junk using a super absorbent yellow towel. Hold the towel in your fist then donkey-punch the submissive and yell out ShamWOW!!
I had the best shamWOW finish last night, and no mess afterwards!
by SMBKRTan November 17, 2009
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