(stock market) A type of stock market or financial derivative order, signifying that the order is to be presented for execution, and if not executed ("filled") immediately (traditionally within a few seconds) is to be cancelled.

plural of fill or kill

Skills or knowledge that are seldom applied are likely to be lost with time. / Property and privileges will be lost if they are not utilized.

Alternative form of by guess or by gosh

(idiomatic) at random

Alternative form of by guess or by gosh

(Ireland) heads or tails

Third-person singular simple present indicative form of trick-or-treat

simple past tense and past participle of trick-or-treat

Alternative form of this, that, and the other