A popular word used by people with colorful and inside humor. "McFucking" does not have anything to do with McDonald's, It's simply a cute way of saying "fucking".
"That was McFucking delicious"
"Bring your McFucking ass over here"
by Wink-Wonk April 21, 2016
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A phenomenon that occurs when you purchase something at the McDonald’s drive through, only to realize that 99 percent of your order is wrong on the trip home.
I ordered a cheeseburger, large fries, and a Diet Coke at the McDonald’s drive through . Halfway home I realized they gave me a fish sandwich, a half filled box of fries, and an orange soda. Goddammit, I’ve been Mcfucked again.
by arnie123 March 18, 2018
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What happens when one of the dumbasses at McDonalds messes up your order
I was McFucked today at lunch because they forgot my pies.
by Zimm January 15, 2005
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1) Horny teenage couples in their droves flock to McDonald's for cheap, disgusting "food" every weekend. Sometimes, dipping the fries in those nasty little ketchup tubs gets too sexually suggestive for them, and they head off to the toilets to bang each other. They think it's risque, but almost everyone in McDonald's has no soul and no shame; their faces are deeply buried in greasy, supersized crap, so they barely notice the kids sneaking off for a McFuck.

2) McDonald's employees that are shagging at work are "McFucking". Presumably, the experience of being "Mcfucked" would lead to some serious "McShame", but as afore mentioned, those that spend large amounts of time in McDonald's have no souls, or personalities for that matter.
"Shall we go to McDonald's and get a McChicken Sandwich? We could sneak off for a quick McFuck too, if you wanna?"

"Norman and Shirley were McFucking at the end of last night's shift. I only noticed because I'm new here and still could go to heaven"
by MagickDio March 7, 2010
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Verb, used by a pissed off McDonald's employee.
Employee to Annoying Kids: Hey, you nd your friends get the mcfuck out of my restaraunt!!
by Matt-0 June 17, 2009
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