groups of teens that try to get attention by acting like they are gnarly. usually they obsess over plain-colored tees, buying blades, or talking about how they want to do drugs. for the most part, grom squads are located near beach communities
person 1: wow did those kids really just throw a water balloon at that car?
person 2: yeah, i bet they think they are so g
person 1: they probably do. they must be in that grom squad