What is Civies?
1.
you're regular street clothes that you wear when out of uniform. this includes any uniforms: work, band, military, school, so on.
also refers to costumes or any other required dress you wouldn't be seen in on a day to day basis.
show up to practice in your civies, then we'll change into our performance clothes later.
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i brought civies to change into right after the game so i can still go out tonight without looking like a retard in my uniform.
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2.
at schools with uniforms days where you can wear watever you want. (usually once a month)
teacher: why arent you wearing you're ugly golf shirt?
student: sir, its civies day!
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3.
Civillians, often used by military personelle.
"Why aren't they in uniform?"
"They're civies here just visiting"
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