A Cassanangle is one who is inept in sealing
the deal. Or in other words he is the guy who is about to
have sex with a certain girl but fails because of
some strange/cheesy comment said.
Person # 1: "I told her I should have never broken up with her
last year and that her eyes reflected her soul back at me."
Person # 2: "Smooth one Cassanangle, you closed
the deal finely."