champ

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

• 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.
• noun A champion.

from The Century Dictionary.

• Hard; firm: as, a good champ road.
• 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.
• 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 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.

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 informal Champagne.
• noun Ireland, uncountable a meal of mashed potatoes and scallions
• verb To bite or chew, especially noisily or impatiently.
• noun countable shortened form of champion
• 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