(game theory) a kind of fair division problem in which there is a divisible heterogeneous resource that must be divided among several partners in a subjectively fair way

A friendship that is utilitarian and opportunistic.

plural of fair weather fan

(Australia, colloquial, informal) A fair chance, a reasonable opportunity; a fair go.

(Australia, colloquial, informal) Used to protest against unreasonableness, such as somebody taking more than their fair share.

Unpleasant behavior is acceptable during love and conflict.

(Australia, New Zealand, colloquial, informal) Synonym of fair suck of the sauce bottle

Alternative spelling of all's fair in love and war

Alternative form of turnabout is fair play

One must take risks in order to achieve a goal; success requires enterprise.