The Collaborative International Dictionary
first-come-first-served
first-come-first-served \first-come-first-served\ adj. distributed in order to those who request it in person; not subject to reservation for later delivery. Contrasted with reservable. [predicate]
Syn: rush.
Wiktionary
first-come-first-served
a. Describing a process of dealing with people using the principle "first come, first served". alt. Describing a process of dealing with people using the principle "first come, first served".