Jazz Hands bro

The act of sarcastically doing jazz hands to show your lack of excitement about something. Usually used when someone is trying to show off about something that really isn't that sweet.

Guy 1: I made out with a Brazilian girl on the dance floor last night
Guy 2: waving jazz hands That's sick bro

Guy 1: I just got a brand new pair of New Balances!
Guy 2: Jazz hands bro