a space is a spade
A fancy way of saying two things are kind of alike but also completely not, and no one knows why.
She called my math test a space is a spade. It was a 68. I got a 72 last time. What even is this?
He said my dad was a space is a spade. My dad is a man. He doesn’t need to be compared to a planet.
My friend called my new shoes a space is a spade. They’re just black. They don’t have a secret identity.