Related Clues:

• 'Yoohoo!'
• 'What do you think you're doing?!'
• Casual email opener
• Fellow Yankee’s call for attention
• Sharp rejection
• 'Hands off, that's mine!'
• "Watch it, you!"
• "Watch it, I'm standing here!"
• Convo opener
• Upbeat greeting
• 'Wrong! All wrong!'
• 'Sup!'
• Call to Jude?
• 'What's up'
• Song word sung twice before "goodbye"