1 definition by The Flanaganator
When a dude has a one night stand with a chick, pulls out and then jizzes all over her. Works best when the girl is abnormally proper and hates the idea of jizz.
Guy 1: "Dude! Did you hear that Alison got flanaganed last night?"
Guy 2: "Haha! She probably freaked out!"
Guy 2: "Haha! She probably freaked out!"
by The Flanaganator May 26, 2010