When giving a person a hand job and anally fisting them and they ejaculate in your hand. You then pull your hand out of their ass. Now with one hand covered in semen and the other covered in fecal matter, you slap them together to mix the mess on both hands. Finally, with your hands still together, you thrust them up the persons ass as fast and deep as you can.
Person 1: Dude this guy gave me a PB and J last night.

Person 2: That is disgusting...
by Ewikkkkkkkkkkk May 10, 2009
Porn Break and Jerkoff. When you've been sitting in your dorm room staying up all night writing papers and assignments but need a wake-me-up, so you turn on some porn and jerkoff.
dude how'd you manage to stay up all night writing those papers?

easy man - just had myself a PB and J
by chameronman March 17, 2011
Penis, Balls, and Jizz, a tasty treat.
All my dad gave me for lunch was a PB and J...
by Synister Spade March 14, 2019
To consume a pint and one beer then proceed to smoke a joint.
Mike: Hey you wanna get fucked up tonight?
Luke: I think I'm gonna go for a PB and J.
Mike: FUCK YA!!!

(Mike and luke then proceed to high five)
by ACIDPILLS September 2, 2008
When two people go really, really well together, like peanut butter and jam. They are almost always in love and are like each other's foil: a person who complements another person and highlights the best parts of each other's personality. Thick as thieves. Partners in crime. Hand in hand. Copesetic.
"Did you see Amelia and her man the other day? Hella wicked! Those two are like PB n J!"
by Raspberry Jam/The Great Magoo February 22, 2010