Eats like a duck 

The act of eating ones food with such speed that chewing is either significantly diminished or out right abandoned in favor of swallowing the portions of food whole.

First refrenced in an episode of the simpsons when a co-worker commented on Homers eating habbits and was corrected by another co-worker.

Grimes: *watching Homer eat his lunch* My god, he eats like a pig!
Lenny: NI dont know, pigs tend to chew, He eats like a duck.
*homer deliberately swallowing a long john dounut whole*.
Grimes: Well some sort of farm animal anyway...

Eats like a duck by Jacob mei December 10, 2010