“Rock band” is a giant umbrella, encapsulating everything from Oasis to Mötley Crüe. But Brooklyn’s Low Fat Getting High brings no uncertainty when it comes to defining a harsh, noisy, and breakneck incarnation of rock. We’re left with no other descriptive phrase to honestly define their sound. Their song “Emasculator,” the first track off last April’s Poor Circulation EP, is really all you need to get fully acquainted with Low Fat Getting High’s energy, because in that song, we’re confronted with some of the bluntest rock music circulating in the five boroughs. We hear blaring, angry guitars and scrappy, rhythmically precise drums. “Emasculator” reminds us that rock bands can take as many cues from Black Flag as they can from Big Black. And perhaps most importantly, this band shows us that rock ‘n’ roll is, and always has been, an outlet for the perpetually pissed-off misfits who don’t give a shit about Vampire Weekend.