D-bagnet
A person so bad, they make d-bags look good. Like a magnet, but for stupidity.
My teacher is a D-bagnet. He gives us homework and then forgets to grade it.
My brother is a D-bagnet. He eats pizza for breakfast and still calls me a d-bag.
My cousin is a D-bagnet. She wears socks with sandals and still thinks she's trendy.