A {British}-slang word
It is a shorten version of "isn't it","is it",right/ok" and "is it?"
It is mostly used to ask a question that you already answered
It also can be used as a way of agreeing with your self
Note:It is usually used at a end of a sentance
Simon: I'm safe innit(Agreeing with self) bruv
Kyle:That's just not true innit(Asking a already answered question)