The act of smearing jelly on the ass of one partner and peanut butter on the ass of the other. Both get down on their hands and knees facing away from each other and proceed to slam their butt cheeks
into one another until the jelly and peanut butter are clearly spread and mixed. Whenever the partners see fit they may stop, take a piece of bread, wipe their partner's butt cheeks
clean, and consume their prize.
Honey, break out the tarp, we're gonna get our PB&J on tonight.