Pulled an Apple

Suing someone, because you claim you invented it or it resembles an idea or concept you had. Meanwhile it's been around long before you came up with the idea. This can even be the simplest of ideas.

Shaun: You hear about Steve?

John: No, what happened?

Shaun: He claims that Bill stole his idea of folding his shirts into squares. He's threatening to sue.

John: Sounds like Steve pulled an apple.