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

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

Scott went banged ole Cock-eye while she was on her period. Then he slapped her with his crimson katana so her friends would know what happened.
by Bhuff24 December 25, 2020

getting a "Crimson Victory" is like getting a medal of honor, its a rare occurance and its only for the die hards.
by TzPL February 24, 2011

by A Very Real Writer April 15, 2021
