Prowling through the mini-mall parking lot, brandishing a sharpened screwdriver, cometh Bosda Di’Chi Of Tricor! And he gives a mighty scream:
“This one’s for you, mom! I sow darkness and discord until there is no more hope!”
Waka ding hoy.
I have used this.
Wow. My real name battlecry is so cooler than my username’s:
I hesitate to post this since it is real and may mean something to other readers:
Black Lions! With me! With Me!
In real life, however, I think I’ll just stick with randomly spewing whatever curse words come to mind.
Oh my…
Zang! Who is that, stalking over the desert! It is SlightDisturbance, hands clutching a studded crowbar! She screams homicidally:
“I’m going to fuck you so utterly, you will polymorph into a purple worm!!”
And how exactly would one go about doing such a thing?
Zang! Who is that, sprinting out of the terrain! It is Ak-Dave, hands clutching buzzsaw hand extensions! And with a bloodthirsty howl, his voice cometh:
“I’m going to gouge out your eyeballs and SKULL FUCK YOU!!!”
(God I love that movie)
All this time I thought my battle cry was:
Beware the Toothpick of Terror!
But in actuallity it is:
Rampaging over the mountains, attacking with two hardened pitas, cometh Don’t Ask! And he gives a booming cry:
“I’m going to fuck you to the moon and back, and launch you into deep space!”
*Yea, verily: Who is that, striding amidst the tarmac! It is SanguineSpider, hands clutching a burning branch! She bellows homicidally:
“I’m going to pound you with such wanton cruelty, you will not be able to see straight!!!”*
ARRR!! See me burnin’ branch, ye scurvy fleas! Cruel I be, that be me! ARRR!!
My real name offers up:
“This one’s for you, mom! I slice through beating hearts like a four-year-old on a sugar rampage!”
Striding across the mini-mall parking lot, wielding two hardened pitas, cometh Chattywine! And she gives a mighty roar:
“I’m going to pulverize you in such an unsafe manner, your momma won’t recognize you!”
YeeeeHaw!
I’m going to spackle you with wasabi!!!
So, what was the medieval guy’s battle cry? “I’m going to go Spartan on your ass!”
My favorite battle cry comes from gaming:
I shall meditate, then I shall kill you!
Hmmm… mine should be something Norse, but more likely it would be…
“Don’t hurt me and I’ll give you money!”
Yea, verily: Who is that, striding out of the mini-mall parking lot! It is Scuba_Ben, hands clutching a sharpened screwdriver! And with a cruel scream, his voice cometh:
“For the love of carnage and discord, I destroy all in my path like a four-year-old on a sugar rampage!”
(Although in reality, my battle cry is usually made unintelligible by either a regulator or a mouthguard.)
I love mine.
Rampaging on the icy wasteland, wielding a reflective halberd, cometh Magayuk! And she gives a gutteral scream:
“I’m going to fuck you all the way to Old Bonny Scotland!!”
And a halberd appears to be a spear with an axe stuck to it. Sweet.
My real name brings forth - “I’m going to fuck you until the Earth stands still!!!”
Oh my goodness! 
They also have a backspike or hook on 'em.
Backspike–for a backhand blow.
Hook–for killing Peter Pan.
Actually, for pulling a rider off his horse.