The often neccessary cleaning of the male rear; often performed with the aid of soap, shampoo, body wash, etc.
by King Shit January 17, 2003
the act of rubbing one's ass in the face of another, should be a surprise attack, and the receiver of the butt wash should have to struggle to get away and be left with a disgusting taste/smell remaining on their face
My roommate was sitting on the couch the other day, and I got up and gave him the biggest butt wash ever. I even left some shit on his upper lip.
by curbyourskeeter December 8, 2009
I have my girl a British butt wash
by Pesky4 December 1, 2013