1 definition by mcnastyofficial

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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