acronym for Grand Master Siddiqi. this title was first given given to the brown pakistani kid who goes to west orange high school by an afghani kid who is less brown. this can be given to any person from pakistan who is surrounded by a mystical aura of islamic awesomeness or to anyone who doesn't deserve to be annoyed deeply for no apparent reason.
Oooo!!! The GMS graces us with his presence!!! (spoken in deep arab accent)