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P. F. U. B. is when you’re so clueless you think you’re the only one who messed up. It means 'Probably Fucked Ur Bitch.' Yeah, 'ur' is 'your.' College boys use it like it’s a fancy word.
Bro, I just got P. F. U. B.’d by my ex. She’s still mad I left her for her roommate.
My crush texted me, 'P. F. U. B. again?' I said, 'Bro, you know I’m not perfect.'
My mom said, 'You’re P. F. U. B. again?' I said, 'Mom, it’s not my fault she’s a drama queen.'