An individual who avoids drinking alcohol at a social engagement for the purpose of driving their companions home.

Alternative form of back-seat driver.

Alternative form of slave-driver

(chiefly US) Someone who drives under the influence of alcohol.

(chiefly Britain and Australia) A person who engages in drink-driving. / (chiefly Britain and Australia, law) A person who operates a motor vehicle when legally intoxicated.

(idiomatic) One who drives slowly or inexpertly, as for leisure or sightseeing. / (dated) One who drives infrequently, and often poorly.

symptoms of fatigue in a person driving a motor vehicle.

(computing) Software, usually supplied with the operating system or by a hardware manufacturer, that communicates between the operating system of a personal computer and a specific hardware device.

plural of slave-driver

An overseer of slaves at work; a person who puts slaves to work. / (slang) An employer who demands excessive amounts of work from employees.