jack diddly dipshit
A jack diddly dipshit is someone so dumb they don’t even know they’re dumb, and they keep doing dumb things like wearing socks with sandals.
My cousin is a jack diddly dipshit. He wore a hat inside a house and said it was for style.
My neighbor is a jack diddly dipshit. She tried to plant a tree in the kitchen and called it a garden.
My brother is a jack diddly dipshit. He tried to cook and burned the toast, then said it was ‘charred art.’