When a person wastes time by contemplating if they have the time to take a poop at any one particular time, without actually taking a dump.
Mel: I don't know guys, I feel a little sick. It's a long drive, maybe I should just .....
Abe: Oh for Pete's Sake!!!! It's 5 AM, Mel! Don't contempoopalate any more and go take a shit so we can drive Joe home.