A complete badass, someone who does what they want when they want. A person you don't want to fuck with. Doesn't look for unnecessary trouble because they know what they are capable of. You can try to be a 'kayden church' but very few succeed.
Person 1: WTF! Did you see what they just did? I'm going to say something...
Person 2: Dude, I wouldn't do that if I were you....They're Kayden Church.
Person 1:Oh shit.