look up any word, like blumpkin:
 
1.
The reddish tinted residue from the menstrual cycle, most commonly observed in white underwear. A more serious instance would be if the girl's pants also exhibited stains.
"Man, did you see Keisha today?"
"No, why?"
"She got some serious period stains on the go."
by jhgfng1 May 07, 2010
 
2.
- The stain left on a females crotch because of her period.

- insult ; worst thing to be called

- red/yellow/ brown stain left over and won't come out no matter how much you wash it from your underwear.
Jennifer was so pissed off that her period stain ruined her new Victoria Secret underwear.

Vicky called Luis as annoying as a period stain
by Vickylover321 June 28, 2013