Ron: Aha look at that jew over there with the massivejewfro.
James: What? Dude that's Liam. He's Catholic.
Ron: He's Catholic? Oh, then why doesn't he shave his goddamn fewfro!?
Verb. To feff is to touch someone else in a way or manner that makes them feel uncomfortable, whether it be through sexual inappropriateness or violation of personal space.