fill or kill
In stock trading, an instruction to fill an order in its entirety at once and, if that cannot be done, to cancel it. No, we have to cancel this order now—it was fill or kill.
FOK
An acronym for "fill or kill," an instruction in stock trading to fill an order in its entirety at once and, if that that cannot be done, to cancel it. No, we have to cancel this order now—it was FOK.