10 Military Phrases That Require More Effort To Say Than Their Actual Meaning

Also, there's a whole library of other militarisms that have vague and interesting meanings. Two of my favorites:
Roger. Usually used as an affirmative that communication has been received--"I heard you." Can be construed inaccurately to mean, "Yes, sir, I'll do what you told me to do." Said with a wrye smile and the object "that", "Roger, that," it can mean, "Yes, I agree that's the way it looks or sounds to me." Often in response to something being SNAFU-ed, funny, beautiful, stupid, etc.
Hooah (an Army verbalism also with Marine variation, Houarrah). This one is great. It can mean almost anything you want. Can be a form of greeting among soldiers. It can mean, "I heard you and will do as I was told." or "That's a great idea, plan, joke, etc." With different inflection, "Hooah?" it can mean, "Do you understand what I said, dummy?" It's also a noun, as in "He definitely has his Hooah on today." Or as an adjective, "This is a Hooah day for a change-of-command ceremony," said the Sergeant Major. One of my favorites, "Hooah, Sir" often used instead of "Yes, Sir."
I'm sure RP members can come up with many more.

FEVER Check: An inflight problem might be analyzed by a FEVER check (fluctuating fuel flow, excessive engine temperature, visual indications, erratic engine operation, roughness). In reality, this check can be accomplished in 10 seconds, but explaining it to a flight student can take several minutes.