Definition of biddy noun from the Oxford Advanced Learner's Dictionary

 

biddy

 noun
noun
BrE BrE//ˈbɪdi//
 
; NAmE NAmE//ˈbɪdi//
 
(pl. biddies)(informal, disapproving)
 
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an old woman, especially an annoying one Word Origin early 17th cent. (originally denoting a chicken): of unknown origin; probably influenced by the use of biddy denoting an Irish maidservant, from Biddy, pet form of the given name Bridget.
See the Oxford Advanced American Dictionary entry: biddy