English

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

 

bumptious

 adjective
adjective
BrE BrE//ˈbʌmpʃəs//
 
; NAmE NAmE//ˈbʌmpʃəs//
 
(disapproving)
 
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showing that you think that you are very important; often giving your opinions in a loud, confident and annoying way Word Origin early 19th cent.: humorously from bump, on the pattern of fractious.
See the Oxford Advanced American Dictionary entry: bumptious