Related Clues:

• Harbor sound
• Car horn noise
• Horn beep
• Trolley warning
• Indulge in self-praise
• Blow your horn
• Whistle blast
• Driver's nonverbal 'hello'
• Tugboat noise
• Gloat
• Recorder sound
• Pied Piper's sound
• Short blast of a whistle
• Fiddle around on a flute
• Train-whistle sound