(vulgar) Energetic but useless action, or a person engaged in such action.

A traditional greeting for Christmas and the new year.

(intransitive, Canada, US slang) To turn left, to take a left turn.

(intransitive, US slang) To turn right, to take a right turn.

An indefinite and somewhat large number; more than a few; a fair number of.

An indefinite and somewhat large number.

(set phrase, colloquial) Suddenly, quickly, without warning.

(logic) Based on hypothesis and theory rather than experiment or empirical evidence. / Self-evident, intuitively obvious. / Presumed without analysis.

(logic) In a way based on theoretical deduction rather than empirical observation.

Alternative form of AD; abbreviation of anno Domini.