PBFL by definition simply means, "Penis beards for life."
Yeah man PBFL!
by Turkeyham July 02, 2011
Poop buddy for life. The person you tell every time you poop and who knows your poop history better than anyone else. A lifelong commitment to sharing your poop information.
"I just dropped a massive turd! Better text my PBFL to let him know."
by EvilParalyse February 24, 2010