hang up the phone
An annoyed or embarrassed response to the stupidity or incompetence of another. Synonymous with "Shut the fuck up", or "Jesus, you're stupid". Derived from one man's inability to counteract the obliviousness of those around him, to which he blurted it out in frustration. Also, an appropriate reply to an unfunny or otherwise retarded joke.
Bo: "Boy, I have a lot of tools in my garage."
Me: "Hang up the phone, tubby."
Me: "Hang up the phone, tubby."