buckle bunny
n.— «Other riders arrived, mostly oblivious to the halo of interest they received, particularly from women. Rodeo groupies are called buckle bunnies for the saucer-size silver buckles that cowboys earn for winning rodeo events.» —“Bull Riders Wait All Day for a Few Seconds of Fury” by John Branch in Baltimore, Maryland New York Times Jan. 4, 2009. (source: Double-Tongued Dictionary)