“Potato!”
Mum? Is that you?
Oh wait, you say you live in Australia… Nevermind. (Beside’s it was my brother’s butt that broke the spoon. )
I tend to leap into battle humming the Capt. Kirk battle song.
GERONIMO! 
BARUK KHAZAD! KHAZAD AI MENU!
“EXCELLLLLLLLLLLLSIOR!”
(With apologies to the late Mr. Jean Shepherd).
Zap!
I use the good old standby:
BANZAI!!!
shaKAAAAAAAAAAA!
This works better if you can wave a spear.
Since the Ozbournes came on MTv my new battle cry is now “Shar-RON!”
~t
In fightin’ situations, it’s usually a muttered “oh, f**k it.”, followed by much mayhem. I’ve got a very long fuse, and I tend to remain calm about the whole mess.
BOOYA!
Wagons Ho! Chway!
BLARG!!!
Cornpone’s Retreat. Heh.
“God hates a coward”
HARAKIRI!! (i realize this may not be politically correct, since it’s what japanese suicide bombers said right before they tried to hit something, but i’ll post it anyways)
YOUR MOTHER!
TOMORROW!!!
Actually it should be
tomorrow…
Here’s a second quote for you.
“The end of the Civil War was near
When quite accidentally,
A hero who sneezed abruptly seized
Retreat and reversed it to victory”
NIGERAGUA!
I LOVE THAT WORD!
Alternatively, a martial arts like “HEY!” or “HAI!” works too.
“Ni!”
Hey, I use it all the time.