Webster's Revised Unabridged Dictionary · 1913

Gob

Gob (gob) , noun

[Compare Goaf.]

(Mining) Same as Goaf.

Gob , noun

[Old French gob morsel; compare French gobe, gobbe, a poisoned morsel, poison ball, gobet a piece swallowed, gober to swallow greedily and without tasting; compare Gael. & Ir. gob mouth, snout, Welsh gwp a bird's head and neck. Compare Gobble, Job, n.]

1.
A little mass or collection; a small quantity; a mouthful. [Low] — L'Estrange
2.
The mouth. [Prov. Eng.or Low] — Wright

Gob (gob) , noun

Same as sailor. [Colloquial]