Grunter Copy link Grunter (grunt"ẽr) , noun 1. One who, or that which, grunts; specifically, a hog. Bristled grunters. — Tennyson 2. (Zoology) One of several American marine fishes. See Sea robin, and Grunt, n., 2. 3. (Brass Founding) A hook used in lifting a crucible.