Related Clues:

• Shout of protest
• Alternative to 'Psst!'
• 'That can't be right!'
• "Yo"
• Not-so-subtle summons
• A way to say "hello"
• A way to say ''hello''
• '___ You' (Pink Floyd classic)
• Loud "Psst!" kin
• "___, over here!"
• "You over there!"
• 'Listen here!'
• "Whoa there!"
• Call to Alexa or Siri
• “Watch it, bub!”