whereas the "rag" originally referred to the maxi pad used when a woman is on her period, "on the rag" is now used generally to mean having/being on your period, whether or not one uses a maxi pad.
girl 1: What's with the mood swings?
girl 2: She's on the rag.
by girlsetsfire March 3, 2005
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to be on your period
"Gee guys... i have cramps, im on the rag. It's been a couple days. no sex for me"
by Lola Radmonavich June 20, 2008
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For a female to have her period.
Damn man, that bitch was ragging so bad she bled all over my bed! DAMN!
by Rag-tastic January 25, 2003
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1. Cleaned (with rag).
2. Battered and beaten or otherwise left worse for wear.

The term originates from how a wet cloth or rag is twisted and wrung out of dirty water and left wrinkled. It is often used in analogy to either describe ones low physical well being, or to describe a harsh but cleansing lecture.
That needs to be ragged.

We were run ragged at work.

I ragged out my sister for being a slut.
by Carl S 2 February 14, 2019
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Not caring, Without thought or emotion
I'm going to break into his house and set him on fire, rags!
by Urban Raggamuffin July 1, 2003
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