Searched the web, but just found lots of uses for it, but never a definition of what it means.
Anyone know?
OMG!!!1111one
Well, the “!!!” part is plain enough, and the “1111” is “!!!” without the shift key, and the “one” is “1” spelled out. AFAICT, the whole thing is a slap at Internet dweebs, their enthusiasm for exclamation points, and their sloppy keyboarding.
Unless, of course, there’s an actual dweeb somewhere who typed out the “one” unironically, in which case I’m baffled.
Other variations include adding an “eleven” on to the ends of the string of ones. This serves the same purpose (which Nametag nailed), but is a bit more amusing the first time you see it.
Oh, dear… I just ruined that, didn’t I?
Yep. It’s basically saying “I am so excited that I have lost the ability to type clearly, if, in fact, I ever possessed it at all!!!11one!”
Nametag’s got it – it’s making fun of the l33t-speak kids with their chatrooms and their MMORPGs and their oral sex and their poor typing, specifically the fact that when excited they’ll add a bunch of exclamation points but remove their finger from the shift key before their other finger is off of the 1 key. Of course, the l33t kids themselves may have started using the joke as well by this point, not just us crochety old geezers who get together to talk about the good old days of mainframe Zork. (Indeed, they l33t kids do apparently use “teh” on purpose, making fun of the fact that they themselves misspell “the” more often than they get it right.)
If some dweeb did, in fact, type the “one” unironically, he would truly be TEH SUXXORS!!!111 lol
–Cliffy
Cliffy pwned this one. He r0xx0r5!!!111 
Jammer
There’s even a poster who is making it his life’s mission to get “!!!11111111twentyfive!!!11111” to become all the rage.
I support him, although I’m to lazy to find teh linxor.
I can see how !!!11111 would be making fun of this behavior, but what is the purpose of the “one”?
Wouldn’t enough people realize what “!!!11111” was making fun of, that someone had to add “one” to the end of that, just to make sure every idiot got it?
On the other hand !!!1111one seems much more surreal and stands out much more than the simple !!!1111, so maybe adding the “one” was a touch of genius !!!111one
You guys are behind the times. I’ve already seen uses beyond the piddly inclusion of “one”, such as:
OMG!!!111!!1one!!@!!@1!!atsign!!
no… the doofuses actually use “!!!1111” in all seriousness. They aren’t making fun of anything. Other people really do add “one” to the end, just to make sure we get that they’re kidding.
Bolding mine of course. 
Well geez, you know Chariman, the kids these days…why back in my day…those damn kids with their “internet” and their “hop-hip music…” Why I used to have to walk eight miles through the driving snow to get my pornography…grumble grumble grumble… ::absent–mindedly scratches eight hundred year old huntin’ dog while refilling pipe and leaning back in chair::
L337 0|24L -> talking as if they’ve ever seen a woman naked, much less done anything with her.
Crazy kids with their oral sex. Damn them anyway.
Maybe the ones are their age in binary
I don’t speak l33t, but, really, this meaning is obvious. Hasn’t anyone noticed that there are four ones?
In other words, it looks like 1111one = four one one = 411, the number you dial to get Information.
In other words, it’s saying (after the exclamation points): “Get a clue!”
That’s me!
As quoted here in the O_o thread.
The minute I see this happening on a message board or blog or advertisement to which I have no direct connection, I will begin my plan for world domination.
I was, of course, referring to this post by Casey 1505.
Come on, now. You all want to do it. Get in on the ground floor with your man Scrappy.
I’d go so far as to say he pwn3d it.
Slight sidetrack–how do you pronounces this leetspeak garbage?
Is “suxxors” pronounced “sucks” or “sucksors”?
Is “pwned” pronounced “owned” or “pwinned”?
Do they just spell funny or do they talk funny, too?