Meaning of the word "a chip on your shoulder" in English

What does "a chip on your shoulder" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a chip on your shoulder

US /ə tʃɪp ɑn jʊər ˈʃoʊldər/
UK /ə tʃɪp ɒn jɔː ˈʃəʊldər/
"a chip on your shoulder" picture

Idiom

to have an angry or resentful attitude because of a past injustice or feeling of inferiority

Example:
He's always had a chip on his shoulder about not going to college.
She walks around with a chip on her shoulder, always ready for an argument.