Related Clues:

• Low-key ''Hey!''
• Sibilant attention-getter
• ''Did you forget about me?''
• Unobtrusive attention getter
• '___! Pass it on ... '
• Sound of a frog?
• Quiet cough
• Sibilant “Hey!”
• "Excuse me, I was here first" noise
• ''Wanna hear a secret?''
• 'Excuse me, I was here first' noise
• Quiet 'Hey!'
• 'Uh, pardon me'
• Muffled ''Hey, you!''
• Discreet call