It is similar to the expressions Oorah in the Marine Corps and Hooah in the U.S. Army. It is used to say Ok or understood or is sometimes used to show enthusiasm. Marines often use it in conversational tone as an alternative to mentioning widget or whatchamacallit. Recently, Air Force civil engineers and special operations forces have taken up this battle cry replacing more traditional USAF expressions.
The origin is unclear, but may be related to "Heard-Understood-Acknowledged" (HUA).
- Oorah—the United States Marine Corps equivalent
- HUA—the United States Air Force equivalent
- Hooah—the United States Army equivalent
- HOOAH! Bar—a US military energy bar
- Hooyah—the United States Navy equivalent
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