When someone bends backwards and their body makes an angle greater than 90 degrees.
Seen in Exorcist movies and an episode of
Family Guy making
fun of a scene from Shawshank Redemption.
Ace: Have you
seen the
trailer for The Last Exorcism? That
chick bends her body into a 120 degree angle.
Gary: That's obtuse!
Ace: Right you are, Gary.