Originally used to define untrained general soldiers. Can be used to identify people in groups who blindly follow the loudest, or even the person standing higher than everyone. Fairly mindless and will believe almost anything that they're told.
Guy: See that Kate? She's been writing hate posts about me for a while now, she dosen't even know the real reason why.
Guy2: She's such a grunt bro.
Guy2: She's such a grunt bro.
by Kanonymouse March 22, 2011