champ

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A champion.
• intransitive verb To bite or chew upon noisily.
• intransitive verb To work the jaws and teeth vigorously.
• idiom (champ at the bit) To show impatience at being held back or delayed.

from The Century Dictionary.

• To bite repeatedly and impatiently, as a horse his bit.
• To bite into small pieces; craunch; chew; munch: sometimes followed by up.
• To pound; crush; mash: as, to champ potatoes.
• To perform the action of biting repeatedly and impatiently: generally followed by on or upon.
• noun The act of biting repeatedly, as a horse on his bit.
• noun Mashed potatoes.
• noun The name given to a valuable timber, the product of Michelia excelsa, a tall magnoliaceous tree of the eastern Himalaya. The wood is soft but very durable, and of an olive-brown color.
• noun A field.
• noun In lace-making: The ground upon which the pattern is embroidered or applied. The filling of brides or links between the figures of the pattern of lace that has no ground or bottom.
• Hard; firm: as, a good champ road.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Arch.) The field or ground on which carving appears in relief.
• intransitive verb To bite or chew impatiently.
• transitive verb To bite with repeated action of the teeth so as to be heard.
• transitive verb To bite into small pieces; to crunch.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun countable shortened form of champion
• noun informal Champagne.
• noun Ireland, uncountable a meal of mashed potatoes and scallions
• verb To bite or chew, especially noisily or impatiently.
• noun architecture The field or ground on which carving appears in relief.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun someone who has won first place in a competition
• verb chafe at the bit, like horses
• verb chew noisily