The act of funneling syrup down a taco shaped French toast in between the lips of the vagina ending in the mouth of another already full of eggs and bacon
Me and Jasmine just had the dirtiest, slimiest breakfast mcnasty.
by Thehamburgular79 April 26, 2017
Get a breakfast mcnasty mug for your father-in-law Günter.
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 06, 2019
Get a McNasty mug for your mate Rihanna.
The "family friendly" YouTuber that plays rainbow six siege with soup, Doo and grizzy
Me: have you watched Mcnasty

My friend: no
Me: :(
by 0001Rememeht December 02, 2020
Get a Mcnasty mug for your dad Trump.
If something is overly nasty or toxic, mcnasty is a better term. Made better known from Creators D1Verified and Litfamous.
by August 31, 2021
Get a Mcnasty mug for your father Vivek.
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 14, 2017
Get a McNasty mug for your grandma Zora.