Guitarded is usually (and at times, considerablly offendsive) slang for a person with some form of retardation playing a guitar, however it does vary. Guitarded could also define a mentally normal person that isn't good at the guitar, or a person that lacks knowledge on music.

It could also refer to guitar center, a popular chain in the US for instruments. Keep in mind, when referred to as "Guitarded center", the person using the word is usually not fond of guitar center (Personally I don't mind the store, but many people dislike it).
1: guitarded as in person with retardation playing guitar:" Hey Mikey, Did you know that Billy with the downs is learning the guitar?"
" Ah...so he's guitarded now, right Jeffrey?"

2: Guitarded as in a person that lacks musical knowledge.
"Dude. You don't even know what a Fsharp/D chord is!? And you've been playing for three years? No offence, Mikey, but you're guitarded."

3: Guitarded as in "person that is poor at playing the guitar": " Says Mr. Jeffrey who's so guitarded that he can't even play the G chord!"

4: Guitarded as in a reference to the music store chain Guitar Center: "Mike, I'm sorry." "I'm sorry too, Jeff. How about we go kill some time at Guitarded center?"
by Blaue Augen December 24, 2006
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A sub-normal human usually devoid of the 21st chromosome, which pretend they are playing a proper guitar, by plugging in a lump of plastic & buttons to their wiitard.

Officially this piece of shite is called- Guitar Hero, & is detremental to the art of playing an actual intrument.
Ned; "I wan' play wiv da shiny fing."
Human; "Oh jeez, 'mongo' has risen, tell you what Ned- go play with the traffic. Take the wiitard & guitard with you."
by A nother August 24, 2008
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when you are bad at guitar playing
I'm so bad at guitar i'm guitarded
by waghghgh April 6, 2008
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look at how guitarded he is. he sucks.
by rachellethequeen February 12, 2008
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When your eyes get disoriented from playing too much Guitar Hero.
{After a few hours of Guitar Hero};

"Dude, is that picture moving?"
"Naw, you just got guitarded!"
by sup brah December 11, 2007
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A person who sucks at playing guitar hero or rock band.

My sister is a guitard hero.
she failed slow ride on easy...on FUCKING PRACTICE MODE!!! (true story!)
by will is sexy November 3, 2008
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A person who is great at Guitar Hero but cannot acctually play a real guitar.
Joe: "Yes! I got 100% on this song in Guitar Hero!"
Jim: "Sorry what was that? I was trying to play this song on my real guitar."
Joe: "Oh wow, I could never play one of those! Too many colors to press at once!"
Jim: "You are Guitarded."
by ThisNameHasNotBeenTaken October 16, 2010
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