Something so awesome, amazing and unbelievable that it is known as "off the dial!" When something is off the dial it rates beyond what the dial can measure. Sometimes shortened to OTD or even OTFD (off the f*ckin dial).
Must be said with exclamation marks!
Some people may respond with "Dude, you need to recalibrate"
That guy's off the dial!
You did WHAT? You're off the DIAL!