Bobby: "What can't I defenestrate my trash out on to the highway?"
Helga: "Are you retarded?! That's called littering, we could be fined!"
(Cue the police)
Billy - "Dude, your a fucking retard. I'm going to show you what getting defenestrated really is."
It has been said that if you defenestrate an elderly woman, she will snap in two.