ton-up boy noun a motorcyclist who has driven at 100 miles per hour; generically, a member of a motorcycle gang UK,1983 From TON
[H]e was one of the original rockers ... a ton-up boy in his Levis and leathers ... grease in his hair ... and the rockers were just taking things on from the Teds who were more flashy[.] — John King, White Trash, p. 159, 2001