Definition of "champ"

They began […] irefully to champ upon the bit.

1594–1597, Richard Hooker, edited by J[ohn] S[penser], Of the Lawes of Ecclesiastical Politie, […], London: […] Will[iam] Stansby [for Matthew Lownes], published 1611, (please specify the page)

Foamed and champed the golden bit.

1700, [John] Dryden, “Palamon and Arcite: Or, The Knight’s Tale. In Three Books.”, in Fables Ancient and Modern; […], London: […] Jacob Tonson, […]

He was mad, reeling about and gesticulating at the rushing train, and champing and gurgling like a lunatic.

1938, Xavier Herbert, chapter XII, in Capricornia‎, New York: D. Appleton-Century, published 1943, page 200

The man beside him placed a cigar between Mallow’s teeth and lit it. He champed on one of his own and said, “You must be overworked. Maybe you need a long rest.”

1951, Isaac Asimov, Foundation (1974 Panther Books Ltd publication), part V: “The Merchant Princes”, chapter 13, page 166, ¶ 18

"They're dressed up very elegantly and it's nice they have a glass of champ, even if it's non-alcoholic," Reif says.

1990 April 6, Ann Heller, “Prom Nights Often Offer Students Primer On Fine Dining”, in Dayton Daily News

We're drinkin' Santana champ, 'cause it's so crisp

2009, The Lonely Island (featuring T-Pain), "I'm on a Boat", Incredibad

'Glass of champ?' she called, skipping into the kitchen.

2010, Tara Palmer-Tomkinson, Inheritance‎, Pan Books, published 2010

If a man, he adds, have taken for his arms 'a low of gules in a champ of silver,'1 […] 1A flame (pile wavy) gules in a silver field. Thus the arms of the family of Bataille de Mandelot are, Argent three flames, per piles wavy gules, issuant from the base. Woodward, Heraldry, i. 158. Otherwise one might almost suppose that the word 'low' of the MS. was a misprint or a misunderstanding of the scribe for 'cow'; for the instance in one MS. of the original French is that of a man who took 'une vache de geules et trois estoiles par dessus.'

1914, John Horne Stevenson, Heraldry in Scotland, page 30