Fiznid Share definition Flag finnished , veg - like state see also ( fucked , mashed , trashed, etc.) yo that geezer's fiznid (whilst pointing at a m8/person passed out) Fiznid by DenIZen199666 February 3, 2010 0 0 Get merch Get the Fiznid mug. Buy Now — $32.95 See more merch