(idiomatic, intransitive) To behave or perform in a showy or ostentatious manner, as if to impress others; to show off.

A performing animal (especially a pony) that knows only one trick. / (idiomatic, by extension) A person or group noteworthy for only a single achievement, skill, or characteristic.

(intransitive, idiomatic) To go about something slowly and carefully or at one's own pace. / (intransitive, idiomatic) To take more time to do something than is considered acceptable.

(figuratively) To be killed, usually in a gruesome manner. / (literally) To suffer decapitation.

(slang, Canada, US) To work exceptionally hard.

Alternative spelling of one-trick pony

(intransitive, idiomatic) To wait, especially for a suitable opportunity.

(idiomatic) To lose all of one's money; to go broke; to undergo financial ruin or disaster.

All opportunities are open to someone; the world is theirs.

(of something said) Softly, so as not to be heard.