Mouldy Sloth Share definition Flag A Mouldy Sloth is when you peel back a foreskin to reveal a green, furry, foisty consistency. “Oh my good God Sandra, I went to give Derek fellatio and he has a bad case of Mouldy Sloth” Mouldy Sloth by Iamhannahbaker April 9, 2019 0 0 Get merch Get the Mouldy Sloth mug. Buy Now — $32.95 See more merch