Super Freaks
From Super-wiki
When the Supernatural fandom began, fans would occasionally discuss collective terms that could be applied to Supernatural fans, similar to "Trekkies or Trekkers" for Star Trek fans, or "X-Philes" for fans of the X-Files.
Discussions were had, polls conducted, suggestions such as rocksalters, saltgunners, renegades and roadies canvassed, but nothing ever stuck.
Super Freaks is a term some fans have used affectionately to describe themselves.
See also Super Fans