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Euphemism for poorly endowed-male masturbation, or for female clitoral stimulation (i.e., like the little man in the canoe). Origin was in the East Bay Area of Northern California, circa mid-1980s.
I was really tired last night after playing chess with my buddies, and I was still scrunchin' the munchkin when I fell asleep.
by SolFrank January 14, 2016
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