Related Clues:

• Crow
• Brag
• Show off
• Talk big
• Sound off
• 'My dad's bigger than your dad,' e.g.
• Be a bad winner
• Toot one's own horn
• 'Veni, vidi, vici,' e.g.
• Toot your own horn
• Bluster
• 'We're #1!,' e.g.
• Act the blowhard
• Dispense with all modesty
• Vain claim