(colloquial) Something important; (with 'the') the most important one, (especially sports) the big game, the big play. / (US, colloquial) One hundred or one thousand dollars. / (US, colloquial) A dollar.

(idiomatic, derogatory) Subject to one's demands because of bribery.

In a single session; finishing a task in the same period when one sets out to do so.

One day, some day (especially in warning of a negative consequence).

plural of one-two

(idiomatic) Having only one opinion, outlook, tone, etc., especially as expressed repetitively; without variety or range.

plural of turn-on

plural of roll-on

(idiomatic, colloquial) Used to express the speaker's belief that a preceding statement expressed a desired rather than an actual state of affairs.

In one's thoughts, especially persistently or recurrently. / Causing worry or preoccupation.