Floppie the Banjo Clown is a fictional character introduced in one of the Blue Man Group's tours. Floppie is supposedly the reason for the popular rock'n'roll hand gesture in which the index and pinky finger are extended (his hair was supposedly shaped like a hand in this position).
-at a rock concert-
Person 1: *makes hand gesture*
Person 2: Payin' a tribute to Floppie the Banjo Clown?
Person 1: Yup!