To do as best one can.

One has a feeling, hunch or a gut feeling that (something is true).

(idiomatic) To scowl, indicating anger, worry, or puzzlement.

Used to ask a person to wait a moment.

(idiomatic) With a large amount of effort or intensity.

Alternative form of one after another

(idiomatic, dated) To get back to the business at hand.

An autobiography

To move one's head from side to side, in a repeated swiveling motion from the neck, to indicate disagreement, negation, disbelief, disapproval or dismay.

(sports, of a competitor) Playing or competing below one's usual level of performance.