Originally worn by american gangs
to honour comrades in prison, where they are not allowed belts or jeans that vaguely fit.

So when the inmates saw pictures of their friends, they knew the guys on the outside where thinking of them. For some reason it took off as a fashion item amongst lower life forms.
( Enigmatic ™                 Voice No More                  ©, Sat 8 Jul 2006, 14:24, archived)

HAHAHAHAHA
What a set of cunts
(bogus official shove it up your cunt, Sat 8 Jul 2006, 14:26, archived)