Green’s Dictionary of Slang

1. (US) a small foreign-made car.

1963

F. Kohner Affairs of Gidget 73: The snug Volkswagon (known around the campus as ‘the pregnant roller skate’).

2. (S.Afr. prison) in pl., handcuffs.

2005

A. Lovejoy Acid Alex 101: They asked me if my escorts had used roller-skates on me? [...] Ja, rollerskates – handcuffs.