Cottyidle Share definition Flag adj., a young child, usually 6-8 years old, who doesn't have work and is naughty, like a young dog or cat. From "catty" and "dog", + "idle" My little brother's such a cottyidle, he's always making trouble Cottyidle by Sparsons September 24, 2019 0 0 Get merch Get the Cottyidle mug. Buy Now — $32.95 See more merch