Green’s Dictionary of Slang

1. (US) a goading or gibing.

1902		Ade Forty Modern Fables 170: The Old Gentleman was very rough on Wallie. He gave him the Gig at every opportunity, for he had no sympathy with Puppy Love and he hated a Dude.
1950		Goldin et al. DAUL 80/2: Gig...a renewal of pressure; a final effort to swindle a difficult victim.

2. (US campus) orig. milit. use, a disciplinary report.

1944		P. Kendall Dict. Service Sl. n.p.: gig . . . demerit. [Ibid.] gigged . . . denied leave for some minor infraction.
1970		Current Sl. V:3 16: Gig, n. A report for deficiency (US Military Academy).
1973		E.F. Droge Patrolman 52: As recruits in the academy [...] we were given ‘gigs,’ or delinquent points as used in high schools, for various infractions.
1987		M. McAlary Buddy Boys 55: All recruits [...] were given three yellow ‘gig cards.’ They were to be carried at all times [...] If a recruit with dull shoes or a stained uniform was spotted by a supervisor, he had to surrender a gig card. If he lost all three cards, he got a reprimand.