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
by disgruntledfm October 2, 2015
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A word to call a close friend or a loved one.
McMuffin! I'm so happy you're home!
by rach9495 June 13, 2010
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A woman with a super-sized muffin top.
Dayum! Check out the McMuffin on dat gurl. She bustin' outta her pants.
by Psychopet October 18, 2011
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Noun
A tasty morning snack of vaginal fluids provided by a ladyfriend.

Verb
The act of eating out your ladyfriend before breakfast because you thirst for her nectar.

- A McMuffin is best served hot and ready after an invigorating morning shower.
Shortly after waking up in the morning say
"Baby, I sure could go for a McMuffin. Get your booty in the shower."
by terraltheible October 13, 2011
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"Oh that guys hot" "no babe i heard he's a bit of a mcmuffin" "ah I dont have enough sausage in my mcmuffin for him then, that's a shame".
by Lazyandhazy November 27, 2015
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Best breakfast item on the mcdonalds menu

Contains delicious ham HAMMMMMM and egg with cheese covered by 2 muffin bread slices
Egg mcmuffin is AMAZING
by WatcherInc August 26, 2022
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Best breakfast item on the mcdonalds menu

Contains delicious and egg with cheese covered in 2 muffin bread slices
by WatcherInc August 26, 2022
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