Jan Barun Share definition Flag A wonderful form of Slavic Justice, most commonly used in retaliation of asshole-like behavior. "This lady wouldn't stop screaming at the cashier in the shop today, so I went full Jan Barun on her!" Jan Barun by Wvrme August 21, 2018 0 0 Get merch Get the Jan Barun mug. Buy Now — $32.95 See more merch