Definify.com
Webster 1913 Edition
Chaw
1.
To grind with the teeth; to masticate, as food in eating; to chew, as the cud; to champ, as the bit.
The trampling steed, with gold and purple trapped,
Chawing
the foamy bit, there fiercely stood. Surrey.
2.
To ruminate in thought; to consider; to keep the mind working upon; to brood over.
Dryden.
A word formerly in good use, but now regarded as vulgar.