Arse nuts Share definition Flag The small lumps of faeces and unidentifiable matter that become entagled in ones anal beard or arse hair. "Holy Crap! I'm festooned with arse nuts!" Arse nuts by Gav and the meat-cleavers December 5, 2003 0 0 Get merch Get the Arse nuts mug. Buy Now — $32.95 See more merch