lishius Share definition Flag A word coined by the popular animé, "Yu-Gi-Oh! GX." It's a positive interjection, meaning similar to sweet or awesome. Yo, Jaden! That duel was totally lishius! -Chumley Huffington lishius by Bastion Misawa November 21, 2006 0 0 Get merch Get the lishius mug. Buy Now — $32.95 See more merch