McNasty

A horrible and disgusting form of diarrea that fills the whole toilet with its volume and the whole house with its odor; is usually due to consumption of fast food or drinking lots of alcohol the night before.

"Dude, why are you clutching your stomach with one hand and covering your ass with the other?"

"Fuck, I knew I shouldn't have mixed rum with pabst with gin with taco bell with a big mac last night, now I have to take the biggest McNasty known to man."

by Danny Sin April 22, 2007

McNasty

Too be excetionally nasty, grimy, or just down right dirty.

Joe has a very McNasty swag.

by swagmarket October 30, 2009

McNasty

A burger from a guy in the McDonalds parking lot that has a load of cum on the meat

What the Fuck, he gave me a McNasty

by Bakken March 3, 2009

McNasty

Someone Who Does it with your ex.. you think shes ugly but shes really pretty but just a rebound girl

Christina-OHH he did it with Mcnasty
Meredith- Yup

by Greys anatomy Fan October 29, 2011

McNasty

when you force feed someone a big mac while raping them

he mcnastyed that trick ass bitch

by Lemony Petaphile June 3, 2008

McNasty

a nasty person that works at mcdonalds & god knows what they put in your food.

I went to mcdonalds last night & McNasty was working the window.

by JeffReedsGirlx3 January 30, 2009

McNasty

A female that has taken disgust and grime to an extremity, a true whore at heart that reminds every man of something that can be purchased at mcdonalds; fat, sloppy, and down right disgusting. Generally, if you are indeed dealing with a true McNasty on your hands, chances are that she is so loose that a football can get inserted with zero difficulty.

Guy 1: Wow bro, every time I turn around that girl is hooking up with a new guy. I can't believe you got with her!

Guy 2: I know dude! Chances are I might have an STD...Im pissed.

Guy 1: Yeah dude I'd get checked out tomorrow, what a god damn McNasty

by President of Piffboro November 22, 2011