Pitmatic (originally "pitmatical"), also colloquially known as "yakka", is a dialect of English used in the counties of Northumberland and Durham in England.
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While in theory pitmatic was spoken throughout the Great Northern Coalfield, from Ashington in Northumberland to Fishburn in County Durham, early references apply specifically to its use by miners especially from the Durham district (1873) and to its use in County Durham (1930).