swellheaded
/ˈswɛlˌhɛdɪd/
adjective
- Having an exaggerated sense of one's own importance or abilities; conceited.
- Her swellheaded attitude made it hard for her to work well with others.
- The coach warned the team not to get swellheaded after their first victory.
- After winning the award, he became so swellheaded that he ignored his old friends.
Synonyms