Green’s Dictionary of Slang

a motorcycle or motorcar.

[1943		AS XVIII 169/1: Scoot, shuttletrain].
1968		‘Sl. of Watts’ in Current Sl. III:2 41: Scoot, n. A motorcycle, the type often used by the Hell’s Angels Motorcycle Club.
1972		Chopper mag. Mar. 15/2: All you got was a few quick glances, possibly sufficient to qualify your ‘bomb’ as a ‘real hot scoot’.
1997–2001		Online Sl. Dict. 🌐 scoot n 1. a motorcycle. Derived from ‘scooter.’ (‘Cheeseman has a new scoot.’).