Top Definition
similar to the classic blumkin but with a twist...when a man OR woman is taking a shit and then poos a little in his or her hand then rubs it on some genitals followed by his or her partner giving oral to the now feces covered genetalia. it is so disgusting that the individual performing oral gives an involuntary hummer with their cry of disgust. this is usually followed by vomit (if performed correctly)
bro...that bitch gave me the best hummerblum! she yacked all over my stinky poop covered ball sack! it was awesome! thanks mom!
by jk miron January 06, 2012

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