Chewing tobacco.

“When the doctor told him to quit smoking, Harvey switched to chaw, but then developed cancer of the mouth.”

A plug or wad of chewing tobacco.

The jaw.

To chew; to grind with one's teeth; to masticate (food, or the cud)

To ruminate (about) in thought; to ponder; to consider

To steal.

“Some pikey's chawed my bike.”