first come, first served

[first come, first served] {truncated sent.}, {informal} If youarrive first, you will be served first; people will be waited on inthe order they come; the person who comes first will have his turnfirst.

Get in line for your ice cream, boys. First come, firstserved.

The rule in the restaurant is first come, first served.

The team's owners announced that tickets for the World Series wouldbe sold on a first come, first served basis only.

There are only afew seats left so it's first come, first served.

Compare: EARLY BIRDCATCHES THE WORM.