Metalligender is a xenogender in which someone feels an extremely strong connection to metal. Either strongly identifying with metal or simply wanting to incorporate it into their identity. You can specify the type of metal you identify with, and refer to it as (metal)gender. It was made with neurodivergent individuals in mind, however, anyone may identify as Metalligender.
One who identifies as Metalligender may refer to themselves as Metalmasc, Metalfem, or Metalenby depending on their gender identity.