For the ones with trouble spelling words with u, they replace most catagories with oo, or 00 (numerical). Usually a IQ of under 12, will prompt you to write this way. It is a sort of internet phonics term for pal/buddy/friend.
It is a word in the intricate language of Leet/1337/Reet
Dood, i r reet!!11oneoneone!1!!
by Harloth September 30, 2003
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Someone that creates a character on a multiplayer online roleplaying server/game without the intent to participate in the roleplaying aspect. They often speak in broken english and even grief other roleplayers.
D00d: aw man where u get dat sword
Roleplayer: Perhaps you were hit on your head in the last battle for Wintergrasp?
by Cambrio December 6, 2008
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The l33t5p34k version of "dude," often used in RPGs to refer negatively to gamers who use l33t5p34k excessively, especially on roleplay-only servers.
"What's up, d00d?"
"Oh, great, d00dz on the server, let's beat the crap out of them."
by GBart February 24, 2005
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a person, usu. in an online battle/strategy game

by catsarefreakinawesome February 16, 2007
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Somebody who is a "ya d00d" is basically a huge douche. These are the guys who's list of friends consists of assholes, people who like to get drunk or high, posers, douchebags, or guidos. A ya d00d is essentially a less conspicuous guido, as they are usually dressed as the stereotypical teenage douche. Sideways/backwards cap, ironically childish backpacks, etc.

A good way to tell who a ya d00d might be is during online communication. When asked a yes or no question, if the answer is yes, they will most likely reply "ya d00d". In certain cases, a ya d00d might actually replace all the o's in a sentence with a zero instead. Ya d00ds often consume a lot of alcohol, and will talk about the act more than they actually do it. A standard ya d00d will not shut up about how often he gets drunk, or how often he smokes marijuana.

If at all possible, try to avoid any ya d00d you may see. They are a hazard to the general public, a danger to your mentality, and overall are just fucking awful. The term can be heard in a line from the song "Those Kids Suck" by Big D and the Kids Table, where he says, "I'd rather be called nuts than to be a ya d00d."
Person 1: Why is Matt even friends with that douche?
Person 2: Well, Matt likes getting wasted. That kid's a ya d00d, so he has a lot of alcohol at his parties.
Person 3: Yeah, to be honest, if he didn't have that much beer, he probably wouldn't have many friends. Nobody likes ya d00ds.

ya d00d: w0w d00d ur n0t c00l mayne
Rational person: Shut the fuck up.

Person A: Why does he have such a hot girlfriend? He's a total ya d00d.
Person B: I guess girls are into complete assholes.
by The Secks August 26, 2010
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A phrase usually used in an Instant Messanger to let people know that you're going to get a bit to eat. It translates from 1337 speak to "food dude", the 0's being added for leetness.
Joe: Gotta go
Bob: Why?
Joe: f00d d00d

---

*middle of conversation*
Joe: f00d d00d
*conversation continues*
by EsbenT March 28, 2006
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someone of the name Domenic, who thinks their a scene kid, when they make their myspace name 'Dom D00d'.
this applies to anyone who uses their name abbreviated, then with a 'd00d' at the end. 133t 5p34k is a normal thing for them. 'www.icanhascheezburger.com' is also saved to their favorites, and the commonly reference cats that lol in ordinary sisutations
DC d00d,
Dom D00d
Dork D00d
Dinosaur jr. D00d ect.
Dom Dood: 0h41 1'm Dom D00d. 1 rly l1k3 101 c4t5.
Normal person: English please?
Dom D00d: 0h U 50 funny.
Normal person: uhh....
Dom d00d: 0h U b3tt4 hyd3. c31l1ng c4t w1ll b3 w4tch1n u
Normal person: im going to go now, *bail*
by istalkyou April 27, 2009
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