A chip on your shoulder

Also Can Be Phrased: 
Chip on one's shoulder
Brief Definition: 
Easily angered or ready to start a fight with someone about anything.
Further Explanation: 
Not as commonly used as it used to be, this idiom reflects a person that no one wants to be around or work with as he/she never seems to be satisfied, is angry often, and is generally unpleasant. The history of this idiom comes from the 1800s when young men would put a small piece of wood (a chip) on their shoulder and dare their opponent to knock it off. In essence, this was their way of starting a fight with another person.
Examples: 
Joe accidentally bumped into Tia and attempted to apologize. Tia’s chip on her shoulder was evident as she yelled mercilessly at Joe for five minutes.
Some people say Archie has a chip on his shoulder but I think he acts gruff because he has poor social skills and is hiding his low self-esteem.
Idiom Ratings
Popularity (Scale 1 to 5): 
2
Formality (Scale 1 to 5): 
5