The Collaborative International Dictionary of English v.0.48:
Chaw \Chaw\, n. [See Chaw, v. t.] 1. As much as is put in the mouth at once; a chew; a quid. [Law] [1913 Webster] 2. [Cf. Jaw.] The jaw. [Obs.] --Spenser. [1913 Webster] Chaw bacon, a rustic; a bumpkin; a lout. (Law) Chaw tooth, a grinder. (Law) [1913 Webster]