HotBox Ninja Share definition Flag a HotBox Ninja is someone who has to sneak in the bathroom and smoke weed because they are an in the closet pothead. Ducky: Why were you up so late? Nova: I was being a HotBox Ninja in the bathroom last night. HotBox Ninja by SD Nova May 27, 2017 0 0 Get merch Get the HotBox Ninja mug. Buy Now — $32.95 See more merch