Mcduff 

When a person runs up to a person with a broken bone and happily punches/hits them in that spot without realizing it. Also dosen't apoligize afterwards and plays off the experience.

Cripple:*shouts in pain*
Observer: dude what happened to you?
Cripple: that kid just f***ing mcduffed me it hurt like hell.
Observer: he atleast apoligized right?
Cripple: no he just left... What kind of a person does that?

Mcduff by Renegadew April 3, 2013

ninja mcduff 

Ninja mcduff is a character in an online MMORPGcalled Tibia. His soul purpose is to steal your loot bags, money and all items he can get a hold of. If your hunting he won't respect you and will kill your monsters. He should not be trusted, he is one of the best ninja's on the server Luminera. His skills are wildly unmatched and he spends most of his time talking to random people. Born out of spite, and the need to make people around him miserable, Ninja Mcduff has been recking havoc for a little over a year.
Things known about ninja mcduff include. Modeling, partying and working at abercrombie, while not playing Tibia.

Player Dave {46}: Hey man my loot bag
Ninja Mcduff {126}: Yea i know thx.
Player Dave {46}: plx man , mines loot plx!!!
Ninja Mcduff {126} : Offer?
Player Dave {46} : Br?
Ninja Mcduff {126} : Learn english!!!!! (throws bag in water)

Today was bull crap, i lost all my home work, i was ninja mcduff'd.

Hey stop acting like Ninja Mcduff, that guy is nuts.

ninja mcduff by Ninja Mcduff June 30, 2008

Steamie McDuff 

When one sexual partner shits on the chest of another, and then proceeds to piss on it, preferably in a cold location in order to produce a pleasing steaming effect.

I was just going to shit on her chest in the alley, but the filthy bitch wanted a Steamie McDuff.

Steamie McDuff by hagga03 March 2, 2011

Egg mcmuffin 

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

Egg mcmuffin by WatcherInc August 26, 2022

Egg mcmuffin 

Best breakfast item on the mcdonalds menu

Contains delicious and egg with cheese covered in 2 muffin bread slices

Egg McMuffin is AMAZING

Egg mcmuffin by WatcherInc August 25, 2022

McDuffle Shuffle 

The McDuffle Shuffle can be seen almost exclusively on the west side of Jacksonville Florida on McDuff Ave. The McDuffle Shuffle consists of standing on the corner with an incomprehensible sign, often attached to a tennis racket. A shuffler is often mistaken for a bum, but bums carry signs that make more sense.

A true Shuffler often offers extremely good song lyrics for sale (mostly rhyming) and plasters his windows with various batshit crazy rants.

Hey look at Jeff, he is down on the corner doin' the McDuffle Shuffle again.

Yup, he sure is, look at his sign, it says, "Munchausen by Jackass" what the fuck does that mean?

It means he is Crazier than a rathouse shit.

McDuffle Shuffle by Jeffwatcher November 20, 2011

McGuffin 

An object or person in a movie that has no use other than to drive the narrative forward. originally coined by alfred hitchcock.

the suitcase in pulp fiction

McGuffin by Jeorge "of the jungel" Boosh April 9, 2005