(idiomatic, colloquial, usually sarcastic, dismissive) Indicates that the speaker does not agree with a proposed action, and does not wish to participate.

Conducted in secret; clandestine.

(UK, Ireland, Australia) Gains and losses that offset each other.

(chiefly UK, informal, law enforcement) The flashing blue lights and (originally) two-tone siren of a police vehicle.

A pair of gears, consisting of a circular pinion that engages with the teeth of a flat bar, that converts rotational into linear motion; used in the steering mechanism of cars, and in some railways.

A drink consisting of a mixture of mild and bitter beers

(archaic, pathology) malaria

(idiomatic) Totally fairly and undoubtedly. / (idiomatic) Within the applicable rules. / (idiomatic) In all fairness; equitably.

(Britain, idiomatic) Alternative form of all mouth and trousers

If you take care of little things one at a time, they can add up to big things.