(US, informal) boastful

Link to present incidents:
The English-speaking world is celebrating Muhammad Ali for his tenacity and inventiveness and his philanthropist commitments in his later years. A “kid on his block“ remembers him (The Guardian):
“He was always, eh ... braggadocious,” Montgomery said. “I remember him telling me: ‘I’m gonna be the heavyweight champion of the world. You watch.’ And I just laughed because he was a skinny kid.”