(idiomatic, intransitive) To move backwards, especially for a vehicle to do so. / (idiomatic, transitive) To move a vehicle backwards. / (idiomatic, intransitive) To undo one's actions.

Alternative spelling of backup

Alternative spelling of backup

plural of back-up

simple past tense and past participle of back up

present participle of back up

Third-person singular simple present indicative form of back up

(informal, idiomatic, chiefly finance, chiefly US) To take advantage of favourable pricing by purchasing a large amount.

(idiomatic) Synonym of get someone's back up: to annoy someone.

(idiomatic) To annoy or anger someone.