Top definition
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
by GibtowN December 07, 2003
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