gabn.[Cf. Gaff.] (Steam Engine) The hook on the end of an eccentric rod opposite the strap. See. Illust. of Eccentric.()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. [Colloq.]()v. i.[OE. gabben to jest, lie, mock, deceive, fr. Icel. gabba to mock, or OF. gaber. See 2d Gab, and cf. Gabble.]1. To deceive; to lie.(Chaucer.)2. To talk idly; to prate; to chatter.(Holinshed.)