Thick arms go a long way...no one will mess with you. Or if they do, at least you can do something about it!

Boost your street cred by donning the brown and pink! No one will mess with the best!

You look angry...very angry. Clint Eastwood does it best.

Don't go overboard, but a strategically placed tattoo can make you look like you just got out of the joint (or may be headed there in the near future).

If you've got a cool looking facial scar, odds are, no one will want to tangle with you.

Everybody knows it's stupid: Maybe that's why movie bad guys do it!

Even Charlie Rose looks like a scrapper. When someone sees a black eye, the usual assumption is that you earned it in the ring or some alley.

Not recommended in all neighborhoods. No one likes a poseur, but if you live in white suburbia, you may get away with looking like a threat.

Smoking is kind of passe, but doing the knuckle coin roll or chewing on a toothpick makes you seem like a dude who's plotting something bad.