the living end
The most exceptional, superlative, or extreme example of something. The phrase can be used both positively and negatively. When I was a teenager, I saw that band at least 20 times. I just thought they were the living end! If she is so mad at me that she won't come to my wedding, then that is the living end!
living end, the
The utmost in any situation, something quite extraordinary, as in When he threw the stereo out the window-well, that was the living end! or That performance was the living end. [Colloquial; late 1930s]