Jiff-Dicker Share definition Flag A term for someone who stuck their dick in a jar of Jif brand peanut butter. "What did you do on saturday?" "I dicked my Jif!" "You are a Jiff-Dicker!!!!" Jiff-Dicker by bluesbro182 June 20, 2009 0 0 Get merch Get the Jiff-Dicker mug. Buy Now — $32.95 See more merch