Infinitely cool, über awesome, hardcore to the extreme.
Say what you will about Bruce Lee or Chuck Noris, Tsutomu Yamaguchi is, hands down, the most badass example of a badass ever to walk the earth: Tsutomu Yamaguchi was the only known survivor of BOTH atomic blasts. He died at age 93 on January 6, 2010.
There is NOTHING more badass than that.
"That Tsutomu Yamaguchi was one badass mofo: he lived through TWO atomic explosions! He eats atomic bombs for breakfast!"