Chestier is an adjective used to describe someone who is excessively confident or boastful. There are many synonyms for this word that can be used interchangeably depending on the context of the situation. Some of the most common synonyms for chestier are arrogant, egotistic, conceited, haughty, self-important, and pompous. Each of these words describes an individual who is overconfident in their abilities or self-worth. These words are often used to criticize someone for their lack of humility or their tendency to brag. In some cases, these synonyms may also be used to describe behavior or attitudes that are deemed as obnoxious or off-putting.