Definitions by disgruntledfm

mcmuffin 

Noun. Generic last name for someone (male or female) who is all fluff and no real substance. Does not live up to expectations or promises. Like a real mickey D's Mcmuffin… looks good, seems good, and maybe even smells good but nothing "good" is there in reality. All fluff and no substance.

Can also be used as an adjective i.e. "mcmuffined"

Yup, Corey Mcmuffin didn't show up again even though he told us all last week he would.

Man that chick is a real mcmuffin, never gets back to me even tough she said she would

mcmuffin by disgruntledfm November 18, 2015

Mcmuffined

Someone who does not show up when they say they are going to

Corey Mcmuffin didn't show up again to help. We've been Mcmuffined!

Mcmuffined by disgruntledfm September 21, 2015