Related Clues:

• “Hold on there!”
• Stops the horse
• "Hold on, horse!"
• 'You take that back!'
• 'What just happened here ...?!'
• "Easy now!"
• "Sup"
• 'Sup'
• Boring Bumble opener
• "Not so fast!" to a galloping horse
• 'Yoohoo!'
• 'What do you think you're doing?!'
• Casual email opener
• Fellow Yankee’s call for attention
• '[44-Across] cow!'