first come first serve
/ˌfɜrstˌkʌmˈfɜrstˌsɜrv/
adjective
- Describing a system or situation where people are dealt with in the order they arrive or request something, without special priority.
- The shelter provides meals on a first-come-first-serve basis, and they often run out of food by noon.
- Tickets for the concert are first-come-first-serve, so fans lined up outside the venue hours before the box office opened.
- The popular new restaurant operates on a first-come-first-serve basis, so we arrived early to get a table.