This is easy...innit?

Innit. Spelt I-N-N-I-T. 'Innit' - usually pronounced that way, usually with a regional accent of some kind, often with a Cockney accent of some kind, often with a Jamaican accent - it's because it's come really from the fashionable use, in London mainly, by the Asian community and the Jamaican community, popularised by Ali G and others. It was actually the name of a film in 1999, 'Ali G, Innit'
http://www.bbc.co.uk/worldservice/learningenglish/radio/specials/1453_uptodate3/page8.shtml