Idiom Definition

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Definition of all hands on deck in English:
Originally a cry or signal used on board ship, typically in an emergency, to indicate that all "hands" (crew members) are to go on deck (top part of ship).
Examples for everyday business use:
We have to prepare a conference for 100 people and we only have 3 days. It's all hands on deck!
Our company launches a new product in two weeks. It's all hands on deck for the marketing department.
It's all hands on deck for the London office after the crash in the financial markets on Friday!