At the highest level of development at a particular time; cutting-edge.

(idiomatic, humorous) An expression sometimes used when a person mentioned in the current conversation happens to arrive on the scene.

(cricket) To bat throughout the whole of an innings, being one of the openers and remaining not out when 10 wickets have fallen.

(interrogative, vulgar, slang) An intensive form of what.

(vulgar) Used to express astonishment, shock, incredulity, or disbelief (as a shortened form of expressions such as "What the fuck is going on?", "...are you doing?", "…is this?" "…is it" or "...is that?").

(idiomatic) Of a person or their behaviour: outside the bounds of what is acceptable, or regarded as good judgment, morality, ethics, etc.

(cricket) Describing a way of getting out in which the batsman deliberately touches the ball with the hand not holding the bat.

(idiomatic) in a period of decrease or decline

(idiomatic) To give someone a feeling of uneasiness or mild fright.

(sequence, idiomatic) From another point of view.