Blad. Many people mistake this for the Jamaican for blood brother. Infact it comes from the american gang slang meaning blood. The bloods are a group of people in America, mainly California, who don't like the Crips, the opposite gang, so to speak. The London slang Blad is a particularly bad way for saying "blood", but means the same thing.
"Aight blad you gon get in sum neak shit, or get shanked in ya beak blad. blap blap."