Webster's Revised Unabridged Dictionary · 1913

Champ

Champ (champ) , transitive verb

[Prob, of Scand. orgin; compare dial. Swedish kamsa to chew with difficulty, champ; but compare also Old French champier, champeyer, champoyer, to graze in fields, from French champ field, from Latin campus. Compare Camp.]

1.
To bite with repeated action of the teeth so as to be heard.
Foamed and champed the golden bit. — Dryden
2.
To bite into small pieces; to crunch. — Steele

Champ , intransitive verb

To bite or chew impatiently.
They began... irefully to champ upon the bit. — Hooker

Champ , noun

[French champ, Latin campus field.]

(Architecture) The field or ground on which carving appears in relief.

Also: Champe