A jab is one of the four main punches used in boxing. Several variations of the jab exist, but every jab shares these characteristics: while in a boxing stance, the lead fist is ...
jab (j b) v. jabbed, jab·bing, jabs. v. tr. 1. To poke or thrust abruptly: jabbed a knife into the log. 2. To stab or pierce: jabbed the steak with a fork.