Frustrated Customer: The Kanoot Valve? What's that?
Lying Mechanic: Well that's what holds your tailgate differential together.
Frustrated Customer: Oh, ok, yeah that's what I thought the problem was.

Kanoot Valve is roughly translated, I don't really know what's wrong with your vehicle, but I want to voice an opinion anyway.
Usually used in context with vehicles, especially fourbyers, who when something breaks, feel they need to contribute something to the problem at hand.
