Definitions by JR12345

MSIMP 

A heavy flow of menstruation that goes without detection for some time. The discovery appears similar to a murder scene.

Murder Scene in my Pants.

Me: Hey Madison, how's it going today?
Mad: Bad, I've got a MSIMP!
Me: That bad?
Mad: Yeah, looks like a group homicide in there!

MSIMP by JR12345 September 5, 2012