A serious case of cerebral palsy that (those with the disease) find fellow cerebral palsy victims (or idiots who will easily follow them) and create a "gang", thus making their embarrassing disease look tight as shit or dumb as hell.
Hood Rat #1: YO NIGGA CHEK DIS SHIT OUT! *cerebral palsy kicks in*
Hood Rat #2: HOLY SHIT IT LUKS LIKE THE WORD BLOOD!
A verbal or visual way gang members identify their affiliation. This can take many forms including slogans, hand signs, colored clothing, and graffiti. The wearer usually favors or is in that particular gang.