"KASHWAK=NO-FO"
"I was grabbed by the Ghoulies"
"All GLORY TO THE HORDE"
"Save me Jebus!"
"Bill? Bill?! BIIIIIIIIILLLLLLLLLL!" ~ As in metal gear solid
"Remember save one bullet" - For yourself obviously
"Warriors....Come ouuuuut and plaaaaaaaaay!" ~that annoying quote from "Warriors" film
Dawn of war quotes are pretty good too:
"Only in death does duty end"-crossed out with a magic marker
"Do you hear the voices too?"
"Fear denies Faith"
"I know no fear for I am fear incarnate!"
"Walk softly and carry a big gun"
"Despair for I am the end of days"
"The reign of the false Emperor is over at last"
"MAIM, KILL, BURN, MAIM, KILL, BURN"
"BLOOD for the BLOOD god! SKULLS for the skull throne"
I'd also rig up a sound system playing a recorded version of the Horde noise at random intervals
Believe it or not this is my edited and trimmed down list.