- Of or pertaining to a jig.
- (slang) Being extravagant, wonderful, excellent, enjoyable, exciting, stylish, cool, successful.
- (slang) Being jittery, fidgety, restless, excited.
- (slang) Being crazy.
"He's gone completely jiggy."
- (slang) Having fun, enjoying oneself totally; losing one's inhibitions, especially when dancing or performing to music.