To bite or chew upon noisily. See Synonyms at bite.
To work the jaws and teeth vigorously.
Champ at the bit To show impatience at being held back or delayed.
Informal A champion.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.