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Used when someone is trying to say two things are both the same and totally different, but they’re too dumb to just pick one.
You said the pizza was like a space is a spade. It was just cheese and sauce. You’re a loser.
My mom said my dog was a space is a spade. It’s a dog. It doesn’t matter if it barks at the mailman.
He said my job was a space is a spade. It’s a job. You don’t need to compare it to the moon.