Klingon bikers
A biker was anyone that rode motorcycles, especially members of a biker gang.
In 1996, there were a couple of bikers at a beach in Los Angeles. Captain Kathryn Janeway and Commander Chakotay saw them while walking by. (VOY: "Future's End")
In 2382 on Qo'noS, two Klingon bikers were involved in a road rage incident in which they told each other to "experience bij." (LD: "A Farewell To Farms")