"Hooah"

http://en.wikipedia.org/wiki/Hooah

Hooah (pronounced /ˈhuːˌɑː/) is a U.S. Army battle cry used^[1] by soldiers "Referring to or meaning anything and everything except no."^[2]

Other popular usages of hooah include:^[4]

• "Heard, understood and acknowledged" (backronym as "HUA")
• What to say when at a loss for words
• "Good copy"
• "Roger," "solid copy," "good," "great," "message received," "understood," "acknowledged"
• "Glad to meet you," "welcome"
• "All right!"
• "Thank you"
• "Go to the next slide"
• "You've taken the correct action"
• "Amen!"
• "Outstanding!"
• "That's cool" or "that's OK." As in, "That's hooah."
• To motivate another soldier.
• Anything and everything except "no."

I don't think anyone defined that for me, it is just something you "KNOW".... but just in case you didn't... there it is!