Definition of "Yat"

Yat

proper noun
1. A unique collection of dialects of English spoken in New Orleans, Louisiana.
  Quotations
  The most distinctive local variety is Yat, called by one observer 'the Cockney of New Orleans'.
  1996, Thomas Burns McArthur, Roshan McArthur, The Oxford Companion to the English Language, Oxford University Press, USA
  Traces of New Orleans' old Yat dialect are still heard around town. Apart from city-specific expressions, Yat sounds an awful lot like the traditional Brooklyn accent, and it reflects the same Irish, Italian and German roots.
  2006, Lonely Planet New Orleans
noun
plural Yats
1. A person of the New Orleans, Louisiana area who speaks with a Yat accent.