An MSN stain is due to a raunchy MSN conversation that ends up with the guy beating off in such a hurry that he only unzips his pants and immediately starts wanking. MSN stains are usually found on the pant leg and surrounding the zipper. Stains can also be found on t-shirts if the said person was unable to hold his bunched-up shirt under his chin long enough.
Violet caused Robert to leave an MSN stain on his pants, as she repeatedly stated how she wanted his hard dick inside of her wet vagina.
by ShVR February 17, 2006

- 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.
- 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
Vicky called Luis as annoying as a period stain
by Vickylover321 July 15, 2013

Non-descript stain (and/or stains) on tents, sleeping bags, tables, portable grill, pillows, blankets, shoes, chairs, picnic tables, socks, under garments, air mattress, all of the above, but mostly shirts that which you have no recollection as of how they got there after a night and/or weekend of camping combined with power drinking.
by BLUEROCKS!!!! June 29, 2011

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by SUPER FURI January 22, 2011
