endstink Share definition Flag (n). The subtle odor emitted from the rear of an indoor pet. Also, a brand of Amerian Designer perfume for indoor animals. <spoken in a sensual whisper> ENDSTINK! For Her and For Him. endstink by DooFunk October 17, 2009 0 0 Get merch Get the endstink mug. Buy Now — $32.95 See more merch