Gab, n. [OE. gabbe gabble, mocking, fr. Icel. gabb mocking, mockery, or OF. gab, gabe; perh. akin to E. gape, or gob. Cf. Gab, v. i., Gibber.] The mouth; hence, idle prate; chatter; unmeaning talk; loquaciousness.
Gift of gab, facility of expression.