to bite upon or grind, esp. impatiently

The horses champed the oats.

to crush with the teeth and chew vigorously or noisily; munch.

to mash; crush.

to make vigorous chewing or biting movements with the jaws and teeth.

the act of champing. ?

champ at the bit, to betray impatience

as to begin some action.

verb

chomp , gnash , gnaw , chump , crump , crunch , masticate , munch