boatswain's pipe

variants: or boatswain's whistle or less commonly boatswain's call

Definition of boatswain's pipe 

1 : a silver whistle used by a boatswain's mate (as in relaying orders to the crew or giving orders to winch and crane operators)

2 : the note or notes sounded on the boatswain's pipe

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to reject or criticize sharply

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