Jbag Share definition Flag Originated in England a Jbag is a slut, whore, slag or sket. Tom: hey i saw your GF giving slops to someone in the park yesturday, sorry bro Rick: Oh my God what a fucking Jbag Jbag by Jack Peters1 May 22, 2019 0 0 Get merch Get the Jbag mug. Buy Now — $32.95 See more merch