Is this trope invoked when a normal human just wears a pair of cat ears on a headband or a hooded top and maybe a tail or fake whiskers? If so I'll add it to the Hello Project page.

This troper is sooo annoyed by people constantly referring to instances of a person wearing cat ears as cosplay. I know [of] a girl who wears cat ears to school every day and doesn't even attract any comments because of it.

This troper thinks that girls wearing a temporary set shouldn't be counted as Cat Girls.

The description says that characters who really are part-cat, rather than just having cat-ears and a tail, belong on Petting Zoo People.

The page on Petting Zoo People doesn't list felinoids at all, saying they all belong here.

Would Nepeta Leijon from Homestuck fit this? She isn't actually part cat, but her horns are shaped like cat ears and she's based around the zodiac sign Leo.

Why was the head scratchers page locked and the discussion nuked?