"Innit" is a common contraction of "isn't it" in British English that is increasingly being used as an all-purpose end-of-sentence rhetorical question. For example:
"We need to decide what to do about that now innit." (don't we?)
"Now I can start calling you that, INNIT!" (can't I?)
"I can see where my REAL friends are, elsewhere innit!!" (aren't they?)
"I'll show young Miss Hanna round to all the shops, innit." (won't I?)
"I heard he was good in TNA when he was there so he can still wrestle good innit?" (can't he?)