When pounding the vagina at a high rate of speed, you miss the vagina and jab the asshole by mistake.
"Hillary, why are you walking like a duck"? "Uhhg, that asshole from the bar last night gave me a starfish surprise".
by Ben Fugin Cho Mamma July 9, 2012
When during the course of sex you slip your member into your partners ass without mentioning it first.
by Gators #1 September 16, 2009