A person demonstrating a sour, bad attitude . Being in a bad mood or a grouch .
Wow, what did you do to him??, Jason's a real Crab Apple McNasty today"
by CAbbyG November 12, 2019
Get the Crab apple mcnasty mug.
Ordering the whole McDonald's menu trying to have an orgasm before receiving your food.
Can be played single player or Co-op

Hardcore mode: Spankbank only! No videos
David: Have you done the McNasty?
Bob: Don't you see the McDonald's bags in the back?

David: Hardcore or easy mode?
Bob: Hardcore baby! spankbank is full!
by BobnDavid December 7, 2019
Get the McNasty mug.
If something is overly nasty or toxic, mcnasty is a better term. Made better known from Creators D1Verified and Litfamous.
by September 1, 2021
Get the Mcnasty mug.
The act of taking two McDouble's, removing the top bun off of one, and the bottom bun off of the otherone, so that there is a 4 patty burger, and putting a McChicken patty between the 4 patties.
"Hey, lets go to McDonald's and make a McNasty"
by mcnastyofficial April 15, 2017
Get the McNasty mug.
the doing of sexual intercourse while on the roof of toys r us while giving your partner a texas chili bowl and singing old elvis songs

Cody Houck decided to go on the roof and mcnasty rebel
by Josh Chotta February 25, 2007
Get the McNasty mug.
To boast on social media about defecating while raping someone
“John pulled a mcnasty on linked in and got sentenced to 721 years in prison. He posted pictures and there was so much feces covering both men.”
by Myguyry December 18, 2018
Get the McNasty mug.
When you drink Monster and chew up Slim Jims and spit it into her coochie
Oh my god, Chad gave me a McNasty and now I have to go to the doctor to see if I have an infection.
by GoonGrizzy October 16, 2020
Get the McNasty mug.