Anyone who is a complete badass and doesnt give a fuck about anything anyone else says. Twisted Steel is a mindset that involves knowing you are better than everyone else and making sure everyone else knows it too. If you are a twisted steel individual you are pretty much the complete opposite of someone who is "straight edge"
It also involves being a complete ass to women then fucking them and never calling them again
Person A: "How'd it go with that girl you went home with after the party?"
Person B: "Well I fucked her and when we woke up in the morning she made me breakfast and gave me her number. Then I left and never called her."
Person A: "That's so Twisted Steel!"