When one participates in so much anal sex (usually homosexual) that when they urinate, there are small chuncks of feces in their urine.
Karl fucked Kaiden in the arse so much, that he now Grivells when taking a piss
by Spangletown September 29, 2010
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adj. - lower class individual, violently scummy or dirty
"that baby is drinking coca cola, how grivel!"
by germanholer April 16, 2005
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