(idiomatic) Hidden, in reserve.

(informal) A drink, especially an alcoholic one, taken as a stimulant or sometimes as a hangover cure; a restorative, tonic or bracer.

(idiomatic) Strong approval. / (dated) A hand gesture indicating strong approval.

(physics) The antiquark corresponding to the up quark.

To die. / To fail or fold; especially, to close or shut down a business; to go out of business.

A command stereotypically given by robbers, particularly when pointing a gun: Put your hands in the air! Surrender!

Alternative form of pick-up line

(intransitive, Britain, colloquial) To close up shop; to end a business activity.

(Australia) A person who is unsophisticated or of a lower class background but achieving a high salary, who spends money on flashy or trashy items to fulfil their aspirations of higher social status. The stereotype includes having speech and mannerisms that are considered to denote poor education and uncultured upbringing, which is reflected in their bad taste possessions and lifestyles.

(chiefly US, idiomatic) To initiate action; to assume or take a responsibility.