(mathematics, economics, dated) game theory.

(mathematics, economics) A branch of applied mathematics that studies strategic situations in which individuals or organisations choose various actions in an attempt to maximize their returns.

(mathematics, economics) Of, relating to, or defined in terms of game theory.

Directly in an area of interest or active operations; in the field. / Used other than figuratively or idiomatically: see on, the, ground.

(physics) A generalized theory of eleven-dimensional supergravity that attempts to unify the five superstring theories

(idiomatic) Irrelevant, moot.

(idiomatic) Irrelevantly, off-topic.

(chiefly Britain, slang) Someone or something very annoying.

To put coins into a parking meter or gas meter.

Alternative form of that's the way the cookie crumbles.