A nerd, to the extreme, putting more emphasis on the person in question's nerdiness.

Put simply, it is the combination of the words "fucking" and "nerd". Fucking nerd = Fnerd.

the art of remembering an arousing occurrence or some porn you watched while masturbating, often handy if you have no porn or your in the shower

A New Form Of Nerd, who's X-tremly smart and likes to Fuck alot with other nerds in otherwords he/she gets around alot.

A bit of toilet paper caught in the pubic hair, larger than lint, but smaller than a wad.

A small piece of fuzz originating from deep inside the pocket of pants, jeans, or trousers.