A slang name used to generically describe the suburbs to the east of London, including Essex. The suffix "-ford" denotes that such towns tend to be situated on a river, often the Thames. Such suburbs including Ilford, Stratford, Romford, etc. can therefore be referred to generally without causing direct offense to their residents. The prefix "Bling" refers to the tendency of some of these residents to wear flashy, or gaudy jewellery, possibly implying that they are chavs.
Sociologist: As we can see from this picture, these two people are chavs, sitting in a McDonald's restaurant in Blingford. They are denoted by their tracksuits, gaudy jewellery and next tattoos.
"That's coz you's a tasteless, chavvy, Blingford mutherfucker, innit! Aight?"