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Ejaculating on ones partner or self, and comparing the shape of the goo to the 1970's cartoon character "The Shmoo".
Girlfriend "I can't believe you just shot your load on my stomach"

Boyfriend "Sorry, I should have warned you.. wait.. does that look like...??"

Girlfriend "Why Yes!! It looks like The Shmoo! Shmooing with you is the best!"
by galactifish July 27, 2011
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