When someone craps on your head with a long turd and a swirling motion. the result is a pile of dookie shaped like a turbin. hence: the name turdbin
by Kevin Mathis March 12, 2004
A big dookie like a chocolate swirl ice cream sundae right on the head of an unknowing loser, creating the image of HAAJI from Johnny Quest. Thus the turdbin is born.
by Captain Cornhole March 13, 2004