nihdix Share definition Flag The word Nihdix is used in place of Sir or Maam when addressing a non binary or gender non conforming individual. Excuse me Nihdix, your car is ready.Dear Sir, Nihdix or Ma'am, we regret to inform you... nihdix by Milasriel August 21, 2020 0 0 Get merch Get the nihdix mug. Buy Now — $32.95 See more merch