A newspaper, magazine, or other type of printed publication not worthy of your respect. Something with which you would wipe up a mess, as with a cloth rag.
I started my career in journalism by working at a small newspaper. It was a rag, but the editors gave me some good advice.
Evolved from "on the rag" meaning having one's period, to "rag" meaning a woman who is having her period, to "rag" just meaning any woman in general.
DISCLAIMER: Women tend to find this term a bit offensive. Calling a woman this may slightly decrease your chances of getting laid.
Guy: "Damn bitch you's one smokin' hot rag. I wouldn't mind tearin' up yo' big ol' ghetto ass."
Girl: (smacks him, pours beer on him, and leaves)
1.V. to give someone a hard time
see also: giving the business, giving shit, f*ckin wit ya
2.N. Womens' period
see also: exscuse for immature women to act rude
I was raggin on him prety good.
I can't swim, Im on the rag.
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.
Not caring, Without thought or emotion
I'm going to break into his house and set him on fire, rags!
A woman's time of the month
The bitch was on her rags, she bleed all over my kitchen table!
being on your period and not being too happy about it.
"fuck off asswipe, i'm on my rag."