Civvies (noun)

Clothes worn by civilians as opposed to military or other uniforms.

Origin:

20th century: from civilian clothes.

Examples:

1. I felt strange wearing my civvies after being in uniform for so long.
2. The soldiers were excited to change into their civvies at the end of the day.
3. He was wearing his civvies because he had the day off from work.
4. I can't wait to get out of this uniform and into my civvies.
5. She was happy to wear her civvies and blend in with the crowd.