When you take a nasty liquidy shit, usually caused by rancid meat from Wendys or Mcdonalds.
Lev took a Mcnasty which stunk up the joint.
ayon kay Chuck ika-22 ng Agosto, 2003
McDonald's. The grossest restaurant chain on the planet.
I'll never eat at McNasty's again. Their hamburgers and breakfast stuff have the same gross-ass taste, and the fries are so damned greasy you can almost wring them out. I remember the first time I had a McRib sandwich; it was also the last time. I puked that up that sucker in the parking lot. Beats the hell out of me how they can sell anything anymore. You couldn't pay me enough to get supersized on that tripe they serve.
ayon kay Warpig9761 ika-15 ng Hunyo, 2006
A McNasty is a delicious combination of a McChicken and a McDouble. To make a McNasty, order a McChicken and a McDouble, take the top bun off the McDouble and the bottom bun off the McChicken. Place the McChicken on top of the McDouble and enjoy!
"What are you going to get from McDonalds?" "I can't decide between a McDouble and a McChicken, I think I'm going to have to go with a McNasty."
ayon kay crazybeaver ika-12 ng Marso, 2009
when a girl does the dirty with you at mccdonalds
AWW man you see that? She just gave me a mcnasty!
ayon kay HAUSBABY! ika-24 ng Abril, 2009
Something extremely awesome and/or unbelievable
Did you see that stunt? That was McNasty!
ayon kay J-Fort ika-23 ng Marso, 2006
When someone has sex in a McDonalds restroom.
Rick- Chad did you have a Mc Nasty yesterday?
Chad- Yeah right after my Big Mac.
ayon kay a keyboard ika-02 ng Disyembre, 2009
Two McDoubles surrounding a McChicken. estimated around 10,000 cal. thats about 5 days worth of calories but its 100% greasy goodness. Also called the McGangbang because it looks like two black patties surrounding a white one
Bro 1:Dude im starvin'
Bro 2: Lets go to Micky D's
Bro 1: Im totally getting a Mcnasty!!
Bro 2: Dude you're sick!
ayon kay Mark Brenner ika-15 ng Pebrero, 2012
Something so disgusting that it challenges the nastiness of any food originating from McDonalds, whether it be actual food or just something really gross.
1. Peanut butter and tuna sandwiches are Mcnasty.
ayon kay Candy Richman ika-01 ng Hunyo, 2004

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