In the carnival industry, this is used as a derogatory word for black people. (Short for "Jigaboo")

Someone people turn to when they're sad who makes them feel better.

A device for guiding a tool or for holding machine work in place.

(Australian slang) to skip school or class, the act of truanting

A fishing lure which gets it's action from jigging the fishing pole while reeling in. Mostly used for bass.

In the south jig is a kind of dance, or to take ecstacy.

Acronym for 'Jump In Game', when a player repeatedly uses the jump button or key to constantly jump for no reason whatsoever.
Once upon a time this was commonly referred to as 'bunny hopping' which was used as an exploit in Counter Strike. These days, this behaviour is most prevalent in online multiplayer games such as WoW where players will be seen 'jigging' around Ironforge just because they can.
Some gamers prefer solo-jigging. Solo-jigging can be enjoyed in single player games such as Oblivion.