This a difficult term to really pin down. From my understanding, for something to fit the "Outsider" label it has to to be a sincere attempt at crafting something conventional, but fails due the creator either being 1) batshit or 2) lacking any sort of 'classical' training. Whether or not these criteria are truly met or by design can be hard to delineate in a scene already made up of pariahs. Here's somethings I think fit the bill: This band endearingly tries to keep up with themselves with woefully flat vocals. I HEAR THE DEEEMOOONSS CALLLING War metal with strange vocal acrobatics. Having trouble recalling any more atm, but you get the idea.