The back side of an estate: the backyard and outbuildings behind a main house, especially (UK dialect, euphemistic) an outhouse. / (euphemistic) A person's buttocks.

(board sports) Approaching an obstacle backward / Used other than figuratively or idiomatically: see back, side.

The painted scenery at the back of a stage; the backdrop.

(Britain) Cheeky or impertinent responses, especially to criticism.

To respond in a disputative, often sarcastic manner.

To hold hair and comb it towards the head, thus giving it a bushier look.

The hairstyle produced by backcombing. / (dated) A decorative comb worn as an ornament and to secure a hairstyle.

To regress; to slip backwards or revert to a previous, worse state. / To shirk responsibility; to renege on one's obligations or commitments.

A backward regression; a reverting back to a worse state.

(idiomatic) An insult disguised as a compliment; a compliment which can be interpreted as an insult.