have a chip on your shoulder
耿耿于怀，(因觉得受委屈或不如别人而)生气
释义：
to seem angry all the time because you think you have been treated unfairly or feel you are not as good as other people(因觉得受委屈或不如别人而)生气，耿耿于怀
例句：
He's got a chip on his shoulder about not having been to university.
Bert had always had a chip on his shoulder because of his accent.
