(colloquial) A contraction of “am not”, used e.g. in the construction "aren’t I?"
I’m a nasty-tempered dog if any one tries to take my bone away; aren’t I, my sons? 1904, George Manville Fenn, To Win Or To Die: A Tale of the Klondike Gold Craze:
Aren’t I supposed to tell you how I feel? 2008 July 1, “Falling in Love”, in The Secret Life of the American Teenager, season 1, episode 1, spoken by Ricky Underwood (Daren Kagasoff):