The only (correct) answer to any (reasonable) order given by a superior rank (or any other rank in a temporary position of authority), usually followed by a swift execution of said order.
Also more often than not followed by some form of swearing/bitching directed against the superior, when out of his/her hearing range (mostly done by conscripts in the first half of their 9-month military service or senior enlistees who consider the ordered task a nuisance and/or beneath them).
German. Meaning: Yes sir! Normally used following an order and tends to preceed a large bout of gun fire and and some dead POWs and/or extensive escape attempts.
A sarcastic affirmative response to an overly strict or domineering person. The German military root of the word implies a reference to Hitler, as his officers would have given the same emphatic response to his orders.
"Bart, I told you to stop whistling that annoying tune!"
"Jawohl, mein mammedant!"