Chair that has a built in ability to lean back. Usually has an extra angled piece on the bottom to allow worry free leaning. Business can be conducted while the chair is flat, and partying can commence when leaning back.
"I'm so glad I can lean back in this chair. This is definitely the mullet of the chair world."
"It's all business when I'm sitting normally, but it's a party when I lean back. The mullet chair."