A term used by brits (black & white) to refer to those from the West Indies, i.e. Jamaica.
"How did we end up in all this ragga business. We ain't even Jamaicans, man. Always trying to keep up with the Windians. Ain't we the real Africans though? It all started with us, and here's us trying to hang. Straining to chat like them from their tiny island."
Source: Movie called Bashment-2010