A phrase used to describe something particularly awful. Similar in usage to words like: bad, terrible unpleasant. Originated from people being too lazy to type the word "Garbage". It was then picked up by gamers who used the jazzed up version over Ventrilo (vent).Usually used when describing the nature of an unpleasant event or occurrence.
Dude1: "How'd you do on your final?"
Dude2: "ahh man I did gar gar"
"Ganked at grom'gol base camp, wow thats fuckin' gar gar."
One who is exceedingly stupid or dim-witted to the point of being unable to form complete sentences. When asked a question, a gar gar will respond with mumbled words such as gar gar gar gar gar.
Trevor: "God damn it!! Who shit on the carpet?"
A gar gar: "Uhh... gar gar gar gar gar."