septic cunt Share definition Flag The descriptive word to define a truely repugnant, filthy, fuked out, piece of shit person. Did you hear that *Jane's* boyfriend cheated on her with his dog!? What an absolute Septic Cunt! septic cunt by CrandyBizkit June 2, 2016 0 0 Get merch Get the septic cunt mug. Buy Now — $32.95 See more merch