[MudPuppy]

Hooah (who-ah), adj., U.S. Military Slang. Referring to or meaning anything and everything except "no."
A masculine guttural sound often used when at a loss for words. More specifically relates to: good copy,
solid copy, roger, good or great; message received; understood; glad to meet you; welcome;
I do not know, but will check on it; I haven't the vaguest idea; I am not listening; that is enough of your drivel;
sit down; stop sniveling; you've got to be kidding; yes; yes sir; affirmative; sure; ok; you got it; thank you;
go to the next [briefing] slide; you have taken the correct action; I don't know what that means,
but am too embarrassed to ask for clarification; that is really neat, I want one too; and amen.

[MoralSense]

F**ckin ay well tol', Bubba.

[Calico]

Hooah (who-ah), adj., U.S. Military Slang. Referring to or meaning anything and everything except "no."

That about sums it up, except that I remember it as "Ooh-Rah!"

[Dale 1]

Outstanding definition!