Off the Richter Scale
Something that is too extreme to be measured. The Richter Scale is officially used for measuring earthquakes; anything above 7 is described as a major quake. Anything "off the Richter Scale" (or "Off the Richter") is therefore an extreme example.
"Man, that surf was totally off the Richter Scale".
Off the Richter scale
Some one going crazy on another person
When my homeboy gets out he is going to go off the Richter scale about his kids
off the richter scale
Used by only the awesomest of people. Used to describe something amazing or not even explainably unbeleivable.
"dude, we went boardin' today and I landed a jump that was totally insane off the richter scale."
"shveet!"
"shveet!"