(emphatic) holy crap.

The primary plot of a piece of literature, television, etc., contrasted with the secondary B plot.

(sports) The best of a set of teams in a single club. / (informal) The group or team which performs its work most effectively; a very good team.

(simile, colloquial) Very easy.

plural of A-team

plural of distinction without a difference

Expressing exasperation or impatience with a situation.

(Britain, idiomatic, slang) To care.

absolutely nothing, none of something.

(idiomatic) To create a particular linguistic expression which is strikingly clear, appropriate, and memorable.