1. self-assertive or proud to an irritating degree

Examples

• The bumptious young executive interrupted the meeting to share his unsolicited opinions.
• Her bumptious attitude made it difficult for colleagues to work with her.
• The bumptious politician claimed credit for achievements that weren’t his own.
• Despite being new to the company, he had a bumptious manner that annoyed his coworkers.
• The bumptious student constantly corrected the teacher in front of the class.
• His bumptious behavior at the dinner party embarrassed his friends.