Bullshitter is an informal term used to describe a person who lies or exaggerates. It is often considered offensive and inappropriate language. Some common synonyms for bullshitter include phony, fraud, charlatan, deceiver, faker, or pretender. Other related terms that can be used as synonyms include con artist, impostor, liar, swindler, or cheat. When describing someone who is prone to exaggerating, we can also use terms like braggart, blowhard, or gasbag. These synonyms describe somebody who is untruthful, manipulative, or deceitful in their words or actions. However, it is worth noting that none of these words should be used to insult or belittle someone.