Green’s Dictionary of Slang

1. (US campus) legs.

1940		Pittsburgh Courier (PA) 27 Apr. 7/6: Her drivers was a blade, her chassis was solid, stacked in the key of C sharp.
1975		G. Underwood ‘Razorback Sl.’ in AS L:1/2 53: drivers ‘legs’.

2. (US drugs) amphetamine.

1971		E.E. Landy Underground Dict. (1972).
2001		ONDCP Street Terms 8: Drivers — Amphetamine.

3. (US drugs) MDMA.

2001

ONDCP Street Terms 8: Drivers — [...] methylenedioxymethamphetamine (MDMA).