Having a "chip on his shoulder" describes a person who is habitually angry, defensive, or easily offended due to a past or imagined injustice. It suggests a deeply rooted sense of grievance, causing them to constantly behave as if they have something to prove or are anticipating conflict, often negatively impacting relationships. 
 
Own chiponhisshoulder.com, a unique and memorable domain perfect for an e-commerce platform selling quirky gifts and lifestyle products. This domain evokes curiosity and humor, ideal for a brand that aims to stand out in a crowded market. Leverage the catchy phrase to attract customers and create a memorable online presence.