Gig (j&ibreve_;g or g&ibreve_;g), n. [Cf. OF. gigue. See Jig, n.] A fiddle. [Obs.]
[1913 Webster]

Gig, n. A kind of spear or harpoon. See Fishgig.
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Gig, n. [OE. gigge. Cf. Giglot.] A playful or wanton girl; a giglot.
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Gig, n. A job for a specified, usually short period of time; -- used especially for the temporary engagements of an entertainer, such as a jazz musician or a rock group; as, a one-week gig in Las Vegas.
[PJC]