Definition of gabby adjective from the Oxford Advanced Learner's Dictionary

 

gabby

 adjective
adjective
BrE BrE//ˈɡæbi//
 
; NAmE NAmE//ˈɡæbi//
 
(informal, disapproving)
 
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talking a lot, especially about things that are not important Word Origin early 18th cent. (originally Scots): from gab + -y.
See the Oxford Advanced American Dictionary entry: gabby