means A hand tool with a shaped tip that turns screws to drive them in or back them out — or, a cocktail of vodka and orange juice.

from A plain compound of 'screw' and 'driver' — the thing that drives screws — appearing as the screw itself spread through manufacturing. 'Screw' comes through Old French 'escroue' (a nut, a female screw), possibly from Latin 'scrofa' (sow) — one charming theory links the spiral to a pig's curly tail, though that's far from certain. The cocktail name is supposedly newer, said to come from American oil workers who stirred their vodka and juice with the nearest tool to hand; a fun tale, and plausibly true, but it's a story passed around more than documented.