mucknuts Share definition Flag When you have had a crap and the toilet paper runs out and the shit dries on your arse I really must get home and change my chuddies', the toilet paper ran out and I really need to hack these mucknuts off mucknuts by ziggyman May 21, 2010 0 0 Get merch Get the mucknuts mug. Buy Now — $32.95 See more merch