How to explain Mumblr? A name that prompts major eye-rolling; a sound that more or less tells categorization to go to hell. Tonight the local four-piece play Kung Fu Necktie, and once again, beg discussion of how exactly it is that they fit into the “fuzz punk” category when they don’t stay fixed on more than one genre for an entire song – or even, as explosive album opener “Holy Ghost” shows, more than twenty seconds. Careening between crashing aggression and moments of forced restraint, there is no method whatsoever of nailing down what exactly these guys do, but if you’re prepared to have all your preconceptions of what constitutes “garage rock” and “time signatures” and “song structure” go right out the window, then Mumblr is your poison. Joined by the punishing but pleasing sounds of Point Breeze and the brutal, crusted-over classic riffs of Ape!, it’s going to be a night that defies logic. – Kung Fu Necktie, 1250 N. Front St., 9pm, $8, 21+ (Photo by Ally Newbold) – Alyssa Greenberg