A covert activity which involves sneaking into a room where a couple of people are engaged in love making, then jerking off to the live show, undetected of course.
by The Odor January 10, 2006
While fucking your girl, quickly put it in her ass and get in a couple of good bangs. When she turns around to say "What the FUCK!" - drop a smoke bomb and get the fuck out of Dodge!
I pulled a Filthy Ninja on my girl last night and the room still smells like sulphur.
by ACE666 January 29, 2008