have a chip on (one's) shoulder(redirected from have a chip on his shoulder)
have a chip on (one's) shoulder
To have an attitude that leads one to become combative or easily angered. Fred has such a chip on his shoulder—you never know what's going to set him off next. She won't admit it, but Kate has a chip on her shoulder when it comes to discussing her career.
have a chip on your shoulder
COMMON If someone has a chip on their shoulder, they feel angry and resentful because they think that they have been treated unfairly, especially because of their background. She thinks he has a chip on his shoulder because he didn't go to university. Note: You can also use chip-on-shoulder or chip-on-the-shoulder before a noun. This sort of chip-on-the-shoulder nationalism makes neighbouring countries nervous. Note: There is a story that in America in the past, men sometimes balanced a small piece of wood on one shoulder in the hope that someone would knock it off and give them an excuse to start a fight.