(mildly vulgar, slang) An intensive form of what. / (mildly vulgar, slang) Indicating acceptance, indulgence, or insouciance: Why not? Who cares?

(idiomatic) Not informed, up-to-date, or current; not included in a process or discussion.

(idiomatic) To make an extra effort; to do a particularly good job.

(ecology) The theory that mitochondria and chloroplasts, which are organelles of eukaryotic cells, originated as independent organisms.

(sequence, idiomatic) to begin with; earlier; firstly; originally; at the start, / (idiomatic) at all, even (typically in non-negated statements)

(idiomatic) In the focus of attention, especially from the media.

(idiomatic, humorous, euphemistic) To be homosexual.

(informal, usually with a negative) To know, understand or have a clue.

(intransitive, of a crowd of people) To gather together in the public streets of a town or city to show communal solidarity in either celebration or opposition. / (intransitive) To rampage or riot.

(idiomatic) To profit from a craze; to join a trend.