What does it mean for a band to "kick ass"?

[Rococo]

I'm sure at various points in our lives we all have heard someone (usually a classic rock fan) say that a particular band "kicks ass."

My questions --

1) What are the telltale signs that a band "kicks ass"?

2) Are there particular characteristics that preclude a band from "kicking ass"? For example, is Ted Nugent precluded from kicking ass because, among other reasons, he doesn't drink and destroy hotel rooms?

3) How many bands are properly defined as "kicking ass"? I submit that it is fewer than 20.

Discuss.