(nautical, of a ship) Wide across the hull. / (idiomatic, of a person, especially a female) Wide across the hips, with large buttocks.

Alternative form of broad in the beam

Alternative form of put the cat among the pigeons

(simile) Extremely pure; totally pure (typically "pure" in the sense of "virtuous").

A theory developed by Terence McKenna that aims to describe "novelty" in the universe based on a combination of numerology and mathematics, and supposed fractal patterns in the I Ching.

(Ireland) What's happening?

Beyond consideration.

(informal) On or to the other side of the Atlantic Ocean.

(US) When landing on a US aircraft carrier: to sight the lights from the multi-colored optical landing system that shows a pilot to be on the correct approach path or how to correct the approach path.

(mathematics) A theorem stating that there is no nonvanishing continuous tangent vector field on the sphere; colloquially, that "you can't comb a hairy ball flat without creating a cowlick".