Character tagging, need examples

[Sirrocco]

I know that a number of fanfic communities have specific tags that they use to describe tropes that occur with some regularity (Slytherin!Harry, Vamp!Willow and so forth) and I've seen a number of uses where it was come up with on the fly, but pretty clear regardless (can't remember any offhand, but things like Cyborg!Xander or Amberite!Xena.) Also used with the title or shortened title of a fanfic universe to designate that version, particulalry when there have been major changes to same.