When a man is having hardcore butt sex with an animal, while being so wasted he won't remember anything. He starts to ejaculate blood into the animal's anus. The animal then has violent diareah all over the man's cock. The diareah gets inside of the man's penis and he gets a disease that makes his penis skin start flaking and bleed constantly. This disease is known as Barbarian Bloody Mary.
Oh man, I got so drunk last night, I woke up on a farm. And now I think I have Barbarian Bloody Mary