Related Clues:

• L. Ron Hubbard's '___ Doc Methuselah'
• Fan noise
• Crowd sound
• 'Yay!'
• 'Yay, team!'
• Encouraging word
• 'Rah!'
• 'Go get 'em!'
• Ring support?
• 'Bravo, torero!'
• Cheering word
• Bull session shout?
• When repeated, enthusiastic
• Pamplona cry
• Relative of 'Hurrah!'