The substance flowing through the veins of Charlie Sheen & other bad ass rock stars that allows them to survive epic partying (copious amounts of alcohol and illicit controlled substances like cocaine, etc) that would kill normal people.
-"The last time I took drugs I probably took more than anybody could survive, I was banging 7 gram rocks and and finishing them because that's how I roll!"
Interviewer-"How do you survive that??"
CS-"'Cause I'm me... I have a different brain, a different heart, ya' know, I got tiger blood man"