To chew or bite on something noisily. The horse chomped on the fresh hay in the stable.
To eat something eagerly and with enthusiasm. He chomped through the sandwich in record time.
(Computing) To remove the trailing newline character from a string, especially in Perl. Use chomp to strip the newline at the end of each line you read from the file.
(usually in the phrase "chomp at the bit") To display impatience or eagerness to start. The athletes were chomping at the bit waiting for the race to begin.