A grouch, often referred to as a grump, is a person who frequently displays a bad mood or irritability. They may complain often and seem dissatisfied with their surroundings or the behavior of others. This demeanor can stem from various factors, including stress, fatigue, or personal issues. Grouches can affect the atmosphere around them, making social interactions less enjoyable. While some people may find humor in a grouchy personality, others might feel uncomfortable. Understanding the reasons behind someone's grouchiness can foster empathy and improve communication, leading to better relationships with those who exhibit this behavior.