Fanfag
Basically an extremely annoying and douchey fan of something (anything from media to celebrities).
Weeaboos are known to be the biggest fanfags of Japanese culture. They spit in the face of real Japanophiles.
Fanfag
Someone who's obsessed with something more than a fanboy . . . they have reached the level of fanfag.
Shut UP, you TOS Fanfag!