"Full feathers" is a phrase commonly used to describe someone who is excessively proud or arrogant. Synonyms for this term include "puffed up," "haughty," "egotistical," and "conceited." Other similar words include "imperious," "supercilious," "narcissistic," and "vainglorious." These words all convey a sense of overwhelming self-importance and a lack of humility. It is important to be aware of these types of personality traits in order to avoid being perceived as arrogant or unapproachable. Using more moderate words such as "confident" or "self-assured" can help to convey a sense of poise without being excessive.