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

 

gasbag

 noun
noun
BrE BrE//ˈɡæsbæɡ//
 
; NAmE NAmE//ˈɡæsbæɡ//
 
(informal, humorous)
 
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a person who talks a lot
See the Oxford Advanced American Dictionary entry: gasbag