have a chip on one's shoulder
An attitude that leads one to become combative or easily angered. Be sensitive about something that happened in the past and easily offended if it is mentioned, because you think you were treated unfairly.
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.
Magyarul tehát ingerlékenynek, sértődékenynek lenni, főleg bizonyos témák említése esetén.
Én itt találkoztam vele:
“You’ve got a chip on your shoulder. Everybody knows it but you. That’s the scary part.”
(Simone Elkeles: Leaving Paradise, pg 184)