McAss is what happens to you when you've been stuck in a McJob for far too long. All the cheap, unhealthy and shitty food that most McJob employees consume eventually goes stright to their asses making their asses resemble two dogs in a gunny sack fighting over an Easter ham.
X: Look at that cute girl making my milkshake
Y: She's cute but look at that McAss, she's got a lot of junk in that trunk
Y: She's cute but look at that McAss, she's got a lot of junk in that trunk
by GibtowN December 7, 2003
by THELIVEACTIONAVATARSUCKED April 5, 2023
Referring to McDonald's toilet paper.
Steve: "Hey, I was taking a McDump in the McBathroom, and you're out of McAss Wipes,"
McDonald's employee: "Then what'd you use to w-"
McDonald's employee: "Then what'd you use to w-"
by CHIEFThotPatrol August 31, 2020
One with the perfect blend of geenus and muffin top, such that it has it's own Mc gravitational pull generally topped by large back tits.
Godzilla in the form of stacked fat roll's, sitting on the whole park bench, devouring deep fat fried oreo's at the fair. Sorry kid's fatty Mcass ate my last 43lbs of cookies.
by grundolph the brown February 27, 2010
by Rody mcass January 5, 2021