jitbag Share definition Flag literally a bag of semen, could literally mean a used condom. In actual usage, it refers to someone who acts like an extreme asshole. "I can't believe that jitbag grabbed my girlfriend's hooters". jitbag by Scoats May 9, 2003 0 0 Get merch Get the jitbag mug. Buy Now — $32.95 See more merch