bumptious

adjective
🔊/ˈbʌmpʃəs/
🔊/ˈbʌmpʃəs/
(disapproving)
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  1. showing that you think that you are very important; often giving your opinions in a loud, confident and annoying way傲慢的;自以为了不起的;骄横的Topics Opinion and argumentc2
    Word Originearly 19th cent.: humorously from bump, on the pattern of fractious.