look up any word, like half chub:
 
8.
Having a pad in one's underwear, as a result of menstruation.
Girl 1: Why ain't you having sex with your boyfriend? You seem so tense.

Girl 2: I didn't want no sex, since I'm on the rag.

Girl 1: I thought you might be. I see some blood on your white skirt.

Girl 2: OMFG
by FemalePower August 11, 2011
 
1.
(adjective) When a woman is "on the rag", that means she has her period. She's also likely in a bad mood because of the various discomforts associated with pads, leaks, tampons, washing out underwear, not being able to wear light-coloured skirts or pants, etc.
She's really in a mood, she's on the rag and complaining about everything. Last night she slept so soundly that she woke up in a pool of blood.
by Jake February 20, 2004
 
2.
All the conventional definitions, plus a case where a mechanical device is malfunctioning for a 5 to 7 day period. See OTR and beating off
Bill, your FIAT is on the rag.
by andy1 May 23, 2005
 
3.
mesnstruating, (from rag, sanitary napkin)
Her pants got stained because she was on the rag and had no tampons.
by Light Joker January 26, 2006
 
4.
A term used to describe a woman's period.
Damn, bitch! Are you always on the rag?!?
by The Great Rando July 14, 2002
 
5.
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 19, 2008
 
6.
when a girl or woman has her period.
When i am on the rag, i get cranky and bitchy and scream at assholes. :)
by Horny Stacy March 17, 2011
 
7.
a woman's menstrual period
It was then to my horror I realised that this fat, disgusting, smelly, gargantuan troll was on the rags...how did I know this? Well looking into the mirror I saw
that I was now the proud owner of my own crimson goatee!!!!!
by Glen Morangie September 17, 2005