Related Clues:

• Conversation opener
• "Stop it!"
• 'You there!'
• Attention-getting call
• 'Check it out!'
• "You, there!"
• "Howdy!"
• "Listen!"
• Word of greeting
• Tripled, Yogi Bear's catchphrase
• "Yo!"
• "Watch it!"
• With 53-Across, a Beatles song
• 'Howdy!'
• "Get your hands off me!"