Green’s Dictionary of Slang

1. an automobile, esp. a car used for the smuggling of rum.

1933		Ersine Und. and Prison Sl.
1939		Wodehouse Uncle Fred in the Springtime 42: ‘Park the scooter abd come in’.
1948		J. Evans Halo For Satan (1949) 78: We’ll use your scooter, Mac [...] Where’s she parked?

2. a legless tramp who travels on a wheeled platform.

1949

Monteleone Criminal Sl. (rev. edn).