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 sandwichPeanut 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?!?
Stands for Poor,Bitter, and Jealous. A term used to counter brokehaters that call you stupid or hurl insults at you for buying an expensive or high value item in a digital world (like spending $1,000+ on a virtual item, assest or limited collectible)
e.g
Hater: "Bro you're so stupid for dropping over a grand on a corny telegram username."
Rich Chad: "Quit being pb&j bro"