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
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If something is overly nasty or toxic, mcnasty is a better term. Made better known from Creators D1Verified and Litfamous.
by September 1, 2021
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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
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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
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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
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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
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