Ob
From BiblePortal Wikipedia
Smith's Bible Dictionary [1]
Gob. (cistern). A place mentioned only in 2 Samuel 21:18-19, as the scene of two encounters between David's warriors and the Philistines. In the parallel account in 1 Chronicles 20:4, the name is given as Gezer .
Webster's Dictionary [2]
(1): ( n.) Same as Goaf.
(2): ( n.) The mouth.
(3): ( n.) A little mass or collection; a small quantity; a mouthful.