Pseudonese
A term used to describe someone who claims to be part of an ethnic group, but has no full-blooded parents or grandparents of that ethnic group.
Dude 1: Hey, did you know Gary's Chinese?
Dude 2: Nah, he's pseudonese, he's only 1/16th Chinese.
Dude 2: Nah, he's pseudonese, he's only 1/16th Chinese.