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(noun, adverb) The act of or actual splash of cold toilet water splashing onto one's bare ass caused by the poop plummeting into the water basin and displacing the water below.
WOW. My ass is really wet from that buttshank.
(insult) You buttshank, go dry your ass.
by C-troubalicious February 12, 2006
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yo, i heard that jake got buttshanked last night, is that true?

yeah its true, it was me who banged him!

yolo right?

by Johnny Cracker 2.0 April 06, 2015
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