Related Clues:

• "Oh wow!"
• "Howdy!"
• "Listen!"
• "Wow!"
• "Goodness!"
• "Golly!"
• 'Man!'
• “How about that?!”
• Word of greeting
• Tripled, Yogi Bear's catchphrase
• Ten C-notes
• "Yo!"
• "Watch it!"
• "Fancy that!"
• With 53-Across, a Beatles song