jap-nasty Share definition Flag being so horribly drunk that you can't form sentences. I swooped hahah what no dude what ffff sugar with it haha I know right what dude I'm really jap-nasty leave me alone *hiccup* jap-nasty by neu December 9, 2003 0 0 Get merch Get the jap-nasty mug. Buy Now — $32.95 See more merch