A mixture a various different alcohols, usually a mix of rum, vodka, whiskey, etc. Often done by teenagers who take small amounts of booze from their parents' bottles so that it is not noticeable. The drink often has a dark brown appearance, hence its name.
Boy: Dude, what is that? It looks nasty!
Girl: It's my dirty sink, want a sip?
Boy: Nah, that shit doesn't look right
Girl: Your loss
Girl: It's my dirty sink, want a sip?
Boy: Nah, that shit doesn't look right
Girl: Your loss
by GinOctober December 15, 2010
Get the Dirty Sink mug.by Wafflebender May 9, 2015
Get the Dirty Sink mug.