The phrase "short temper" refers to a person's tendency to become easily annoyed and angry. There are a number of synonyms and related terms that can be used to describe this trait. Some common synonym for "short temper" includes hot-headed, irritable, touchy, tetchy, testy, peevish, edgy, temperamental, volatile, hotheaded, and irascible. Each of these terms conveys a slightly different nuance or emphasis, but they all generally describe the same tendency towards quick and sometimes explosive anger. Understanding these synonyms can be helpful when trying to describe someone's personality or behavior, or when trying to identify and manage one's own emotional responses.