a "dirty jess" is a sexual term for oral sex. Most commonly known as "extreme 69" but more intense, where at the end, both of the participants float away in a hamster wheel.
boy1: yowanna do a dirty jess?
girl1: sure daddy *floats away*
A dirty Jessie is a act where a person pisses in someone's mouth whilst that someone has previously had multiple laxatives thus creating a hot running mess of shit that a lucky recipient starts to eat.
This is also commonly know as the "in one, out the other trick"
A dirty Jess is licking out your dog while your cat watches then you proceed to shit in your own mouth swallow it and shit in your dogs mouth. It's a repeated cycle.
When a wild Jessie has a smallsmudge on her face because she was cleaning her yard and accidentally wiped the back of her had on her forehead and the dirt from her labour stuck
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.