What does BFU BFU BFU BFU BFU mean?

BFU BFU BFU BFU BFU meaning in Urban Dictionary

English: Brain Free UserCzech: Bezny Franta Uzivatel Butt-Fucking Ugly. Bloody fucking user.Often used to describe a person who uses PC but don't comprehend it at all. Butt Fucking Ugly; positively hideous Bitch bang one to text some one and without totally writing it only say B.F.U