The Oxford English Dictionary has a new entry.
BBC News claims it’s just doh. shrugs I can’t search the OED site since I’m not a member. Do we have one out there?
It took many years before I saw them use dis on CNN, I wonder whow long before their news anchors use this one.
I went to the OED Online because I was curious to see if they defined it as a slang word or not. I couldn’t login though because the site is by subscription only. Doh! 
Anyone with access want to look it up for me?
The entry is given in their current newsletter, accessible to all - http://www.oed.com/public/news/0106c.htm#doh .
It is classified as int., colloq. I assume that means interjection, colloquial. Different from slang, I’d say
Damn, I was going to post this info with the title “D’oh Eee Dee”. You know, like O-E-D … ah, forget it.
Yes, that’s different, but I think can handle colloquial interjections in the OED. 
[sub]I’m such a word snob![/sub]
Look ,too.
“Exclamation - Informal - used to comment on an action perceived as foolish or stupid: He had approached the wrong set of supporters. Doh!”
Taken from Oxford Dictionary.
Thanks, Kat! Informal satisfies my word-snobbiness too.
I do have to confess to a deep envy that you can access the OED Online and I can’t.