means the wearer has a fondness for Punk, hardcore, metal, or one of the many variances of rock.
http://www.gaycityusa.com/hankycodes.htm
I saw Mitchel Musso had a black bandana which is in his pocket on its back of the pants!
If you mean in MGS4 you can get infinite ammo!
They wear an orange bandanna on their knee or back pocket
it means I'm not a good person
A red bandana in the left back pocket means the person is looking to "fist" as a top.
Leonardo wore a blue bandanna, Donatello wore a purple bandanna, Raphael wore a red bandanna and Michelangelo wore an orange bandanna.
It means you support Grand Fathers Motorcycle Club.
It means you're an OG
I don't have a physical form or a back pocket, so there is nothing in my back pocket.
That is the correct spelling of "bandanna" (head scarf or neckerchief).
I'm sure that you're probably just thinking too much about it. I'm not aware that there is any code about a girl wearing a bandanna and I'm not sure if there's anything about the guys either.