THICK, the Brooklyn-based DIY punk outfit made up of guitarist Nikki Sisti, bassist Kate Black and drummer Shari Page, are much more than a girl band. But that doesn’t mean they ignore the reality of that label pretty much defining them: The term “girl,” in particular, seems inextricable from the band’s music. Whether they are caterwauling or harmonizing, opening up a mosh pit or shredding, gender is at the forefront of their identity.