A blow job that really sucks because the girl is too drunk and basically just drools all over your dick.
Man, that girl was so drunk, she left my dick soaking after that knob wash.
by B. Anana January 19, 2010
n. The act of dipping your dick in a girls' pussy to clean it off after you've fucked her in the ass
"I did her ass in the missionary position so it was easy to get a knob wash in her cunt afterwards!"
by BigBad Wolf May 18, 2006