1) A moron, idiot, dumbass, and overall stupid.

2) A human who accidentally got into santa's bag, and was raised by elves, who because of his human form, cannot make toys as fast as the elves and is inferior.

3) An inferior toy-maker.
Buddy: "Why don't you just say it? I'm the worst toy-maker in the world. I'm a Cotton Headed Ninny Muggins."
Elf: "No Buddy, you're not a Cotton Headed Ninny Muggins. We all just have different talents, that's all."
by AnAsian2010 December 19, 2009
mugGet the Cotton Headed Ninny Mugginsmug.
From the movie "Elf", with Will Ferrell, who is called a cotton headed ninny muggins by one of his elf friends at Santa's workshop.
"Buddy, you cotton headed ninny muggins!"
by HeathxAnna January 11, 2009
mugGet the Cotton Headed Ninny Mugginsmug.
One who thinks he is humorous and/or lacks brain capacity; a doofus
Notice how the two previous posters before me are, themselves, cotton headed ninny muggins's?
by Ctrl April 22, 2006
mugGet the cotton headed ninny mugginsmug.
a diss/insult in a funny, babyish way. It adds humer to any harsh fight and you may hear it coming from a whole range of different ages.
your such a cotton-headed-ninny-muggins! what is your problem
by stick it January 1, 2006
mugGet the cotton-headed-ninny-mugginsmug.

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