It's not a handshake, it's not a fist pump, it's not a... well, you get it. A jazz hand is when you involuntarily slap the air in excitement or frustration. But have you ever wondered about the long-term effects of jazz hands?
According to our completely-not-scientific research, jazz hands can lead to:
Don't just slap, do you really want to know more? The Risks of Jazz Hands or How to Live with Jazz Hands for more information.