(gig) noun
1. A light, two-wheeled, one-seated vehicle drawn by one horse.
2. A machine for raising a nap on a cloth by passing it over cylinders fitted with teasels.
3. Naut. A ship's boat in which the oarsmen are seated on alternate thwarts; also, a speedy, light rowboat.
—v. gigged, gig·ging v.i. To ride in a gig.
—v.t. To raise the nap on (cloth). [Origin uncertain]

(gig) noun
1. A pronged fishspear.
2. An arrangement of four barbless fish hooks fastened back to back and drawn through a school of fish to catch them in the bodies.
—v.t. & v.i. gigged, gig·ging To spear or catch (fish) with a gig. [<FISHGIG]

(gig) Slang noun
A demerit, as in the army, school, etc.
—v.t. gigged, gig·ging
1. To give a demerit to.
2. To punish with a gig. [Origin unknown]