Meaning of the word "first in, best dressed" in English

What does "first in, best dressed" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

first in, best dressed

US /fɜːrst ɪn best drest/
UK /fɜːst ɪn best drest/
"first in, best dressed" picture

Idiom

used to say that the people who arrive first will have the best chance of getting what they want

Example:
There are only a few tickets left, so it's first in, best dressed.
The sale starts at 8 AM, first in, best dressed!