Means what you'd think it means: Hideous Idiots.
"Oh, Great Giant! Thank you, Mighty Colossal Allied Thing, for stepping on the Specks of Rilonate and making so much mush of them! Your immense foot has crushed our ancient foe in an instant. Squashed beneath your mammoth bulk, these unspeakable hidiots have been reduced to the evil scum that they have always represented. We are now delivered forever from their constant whining, taunting and bantering. You, Magnificent Titan, are our national hero! Oh Necromaniacal Whopper, you shall be the greatest of all figures in the history of Rod. There is none equal to your fabulous enormity on all of Ogdilla. You, Tremendous Gargantua, shall be second only to myself, unless of course you would rather be number one. By the way, we thank you, Phenomenal Behemoth, so very much for not stomping on us too. I can only offer our humble Kingdom to you, Amazing Monstrosity, as compensation for the wonderful deed you have accomplished today. It is not a kingdom worthy of your monumental grandiosity, of course; you won't like it much. You will probably not like anything we offer you, since it is all tiny compared to your gigantean size. But of course, anything we have is yours, but I don't know what you would do with it. I say, do you understand me?"
-The Neverhood Chronicles