first off whats with the name calling?! Second and more importantly dihydrogenmonoxide would be correct according to every chemistry textbook that I've ever read (except for the fact that due to its extream chemical wierdness it doesn't get a "sientific name" its always just "water" or H2O). Think about Carbonmonoxide or CO, the mono can (according to [american?]intro chem books) only be droped for the first element (in this case the carbon) and if it isn't 1 a prefix is used; the second element always gets a prefix even when its just 1. Then again there are always exceptions such as N2O which gets called any one of a number of things including Nitrous oxide, dinitrogen oxide and dinitrogen monoxide.
Which is exactly what makes your name calling so inaproprate, you are both equally wrong, H2O is only WATER it doesn't have a "chemical" or "scientific" name, just water. the whole DHMO thing is a joke to scare the people who failed/forgot their chemistry

in conclusion...mod the troll down, please.

PS. grammar/spelling nazis, yes my spelling is pretty bad but this is not my home computer with has firefox with spell check so ya'll are just gonna have to deal :)