P.F.U.B.
P. F. U. B. is the worst thing you can say to someone. It means you probably fucked up your girlfriend. Your is 'ur.' You’re a loser if you use it.
My best friend said, 'You P. F. U. B.’d my sister.' I said, 'Bro, it was an accident.'
My dad yelled, 'You P. F. U. B.’d the whole family!' I said, 'I didn’t even know her!'
My crush said, 'You P. F. U. B.’d me again?' I said, 'I didn’t mean to.'