(idiomatic) Extemporaneous; without prior preparation; spontaneous; impromptu.

(idiomatic) To confuse; especially, to lose a pursuer. / (idiomatic) To introduce errors or inaccuracies; to skew. / (transitive) Of a horse, to eject its rider. / To expel, reject, or renounce.

(cricket) To play such a shot.

Alternative spelling of brush-off

Used other than figuratively or idiomatically: see brush, off. To remove something with a brush. / (idiomatic) To disregard (something), to dismiss or ignore (someone), as unimportant.

(UK, idiomatic, vulgar, colloquial, dismissal) Go away.

(American football) A pass made in a backward direction.

To pull off by ripping / (idiomatic) To steal, cheat or swindle. Especially to charge an exorbitant or unfair rate. / (idiomatic) To copy, especially illegally.

(transitive, now often figuratively) To drive something away with blows or military force. / (intransitive, idiomatic, vulgar, colloquial, chiefly US, Canada) To masturbate, usually a man of himself.

(US) To fill or refill the final portion of something that is not empty, until it is completely full. / To complete, to put the finishing touch to (something).