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."
by crazybeaver March 12, 2009

by J-Fort April 19, 2006

Something so disgusting that it challenges the nastiness of any food originating from McDonalds, whether it be actual food or just something really gross.
by Candy Richman June 01, 2004

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!
Bro 2: Lets go to Micky D's
Bro 1: Im totally getting a Mcnasty!!
Bro 2: Dude you're sick!
by Mark Brenner April 11, 2012

An extremely rancid, bloated, overweight and unkempt person--especially one who has the odor of decayed feces even after exhaustive bathing.
by godde$$ April 29, 2005

This is when a male picks up a female at a fast food restaurant like MacDonald's. Usually there are other disturbing things involved with the incident.
The other day my friend went to MacDonald's for some post drinking treats and he got a McNASTY to go...hold the fries.
by Chuck June 10, 2004

dood:i went to the bathroom and someone had sharted all over the seat, i don't think he made it!
Dood2:AWW bro! that is so McNasty
Dood2:AWW bro! that is so McNasty
by k_u October 09, 2008
