0 the action of holding your hands up with palms (= inner surfaces) showing and waving them, in a style used in some types of dancing and in musical theatre shows:
As camera flashbulbs popped they mimed disco moves and did jazz hands.
She shimmies, then makes jazz hands, as if life is but a musical.
He plays a dancer who tries desperately to upstage the others with jazz hands and flings of the hat.
The music course was really great. There was no dancing or anything like that. No jazz hands.
