Ridgender is a Cadensgender or Musicagender in which one's gender is influenced by or is best described using riddim, a heavier dubstep sub-genre, and other similar riddim genres, like briddim or color bass or others. For example, one might be Cisgender normally but a Demiboy when listening to riddim. Unlike Riddimgender, Ridgender doesn't have anything to do with masculinity.
Flag
The flag was created by FANDOM user, InsanityAHHHHHHH. It has no meaning with the colors itself, but it represents Ridgender.