Marines, of course, would never say “Hoorah!” They also wouldn't say “Hooah!”, which is an Army term. Marines say “Oorah!” and are quick to point it out to anyone who gets it wrong. You can't blame the president for this one, but a little professional military education never hurt anyone.
In this regard, what does marine oorah mean?
Oorah is a battle cry common in the United States Marine Corps since the mid-20th century. It is comparable to Hooah in the United States Army and the United States Air Force, and Hooyah in the United States Navy.
Why do Marines say Hoorah?
Short for “Oohrah,” a Marine greeting or expression of enthusiasm similar to the Army's “Hooah” or the Navy's “Hooyah.” Rah, however, is a bit more versatile. You could be agreeing with someone, by saying “rah.”
What is the Marine response to Semper Fi?
The answer to “Semper Fi” is “Semper Fi”. It means always faithful and saying it is expressing/exchanging your sentiment for the Corps. Semper fidelis is a Latin phrase that means "always faithful" or "always loyal". It is the motto of the United States Marine Corps usually shortened to Semper fi.