Having vaginal intercourse with a girl on her period. Followed by anal sex with a penis still covered in period juices.
"My friend got weirded out having sex with a girl on her period, so he flipped her over and gave her a crimson mudslide"
by Hugh Gass August 31, 2005

when you think your period is over and you take a hugeeeee shit and you look in the toilet and see red blood swarming your shit. AKA You got your period back dammit!
by kritio January 20, 2009

by A Very Real Writer April 15, 2021

Dude1: Man, is it just me, or were all those bitches acting crazy?
Dude2: I don't know man, they must have formed a crimson alliance or something.
Dude2: I don't know man, they must have formed a crimson alliance or something.
by ossel September 23, 2011

by hollyupa August 16, 2017

when a menstruating girl straddles a man's face and fanny farts the clots and gunk all over his mush
by uprightuk September 8, 2010

not related to playing an actual instrument, the crimson violin refers to cutting your own wrists. the violin is the sawing motion one makes (across the street not down it!) and the crimson is the blood shed. makes it alot easier and more casual to ask if said person is a cutter.
"Laura is wearing long sleeve shirts lately and its july."
"does she play the crimson violin?"
"haha maybe! i wouldnt be surprised."
"wow that was very casual and easier than asking if she rips her wrists apart."
"your right. i love UD"
"does she play the crimson violin?"
"haha maybe! i wouldnt be surprised."
"wow that was very casual and easier than asking if she rips her wrists apart."
"your right. i love UD"
by ]ulio September 10, 2007
