When you’re hittin it from behind and you pull out and your firstload goes on her pussy, and the rest goes on her butt. Therefore it’s a pussy butt and jizz sandwich
Originally used for talking about a blow job in public, it is now used as a way of saying the word 'blow job' discreetly. Referencing the sandwich Peanut Butter and Jelly, it stands for Public Blow Job.
Person 1: did you hear person was giving other person a Pb&J in the principals office?
Person 2: What?!?
Old h3h3 moderator. Internet rumors say his username “PB_nerd” was a secret code for p3dophiles… however, there is little to no proof of these claims. PB could mean anything.