originally a British youth subculture that evolved out of the teddy boys in the 1960s; wore black leather jackets and jeans and boots; had greased hair and rode motorcycles and listened to rock'n'roll; were largely unskilled manual laborers
"The original bikers from the 60s, with their greased hair and leather jackets, often found work as unskilled manual laborers while listening to rock 'n' roll."
plural of biker
"The group of bikers gathered at the rally to share their stories from the long ride across the country."