Top Definition
To set someone's computer desktop as, or to send someone a link of a grotesque picture of hemorrhoids. It is meant to be a joke, and is supposed to be a surprise to the victim.

Past tense-Hemmed
Dude, I love to hemm people. I so totally hemmed Gaby last night on Facebook! She completely freaked out!
by Adam Javoski January 22, 2010
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