bumptious adj(derog 贬)(of a person, his manner, etc) self-important and conceited （指人,举止等)自负的,傲慢的,骄横的: bumptious officials, behavior 骄横的官员,行为.
bumptiously adv. bumptiousness n [U].
"I wish the DJs on this station weren't so bumptious," said Andrea. "I'd prefer to just listen to the music."