A group formed by the late tupac shakur and a code that showed they aren't all just criminals, they believe in something that was worthy to believe in.
The belief that what ever damage I may do to others is OK because others have damaged me. I want what I want now and I don't care what I have to do to get it, or who I damage or destroy in the process. I feel no remorse, and regard conscience as a sign of weakness. I don't consider the future because I know I have none. When I die I will leave behind little copies of myself who will have to struggle with the thug lifestyle I've left behind. I will be morned by none and forgotten by all, because it was easier to be a thug than a husband and a father.
You can wrap thug life in all the bullshit you want, it's still the way of the loser. Wiggers can play thug life and go home to mommy and daddy when they get tired of it. Where will your kids go when the thug lifestyle gets tired of you?
It represents what drove 2pac - his absolute fundamental. Having integrity and staying true, absolutely. He came from the truth and this is the life of a thug. It's a reoccurring theme throughout his entire career. Similarly, being a thug means someone who stays true - doesn't lie, bullshit, cheat or snake.
Opposite of someone who has all the needs to succeed. Thug life is when you have nothing, and succeed, when you have overcome all obstacles to reach your aim.