Pronounced "g-ee-tard" - with a hard "g", and emphasis on the "ee" sound.
Applies particularly if excessive guitar-playing has caused or contributed to the retardation.
What a guitard!
(Noun). One who lacks, or appears to lack, the requisite cognitive development to navigate through or operate computer programs or interfaces
Hey Mike, I can't seem to find the button that let's me change the font.
Boy Derek, you certainly must be GUI-TARDED