(Pronounced: o no you dit-ten) A colloquial expression of incredulity, voiced upon witnessing another's action or statement, or hearing of it from the actor firsthand.
"Step off, bitch," said Tyrone. "Oh no you didn't!" exclaimed Shanequa.
by TopSecret September 26, 2007
1. A word used when your girlfriend just found out her best friend has been sleeping with you, and her brother, and her out of town cousin.

Usually it results in a cat fight in which she slaps the bitch and they start rolling around slapping and pulling hair. While Guys stand around watching waiting to see some panties. unfortunately most of the time their panties reveal a dark secret... Mr. Happy! Then you decided to pull your so called 'girlfriend' and chuck her out the plexiglass window.

2.See Don't go there girlfriend
1."Oh no you di'n't!" "Oh yes I did!"
"Oh really?" "Really!" "F-cking skank b-tch go suck your mother's hairy -ss. You stupid chauvnistic c-nt licker!"

2.JUST DO IT!
by DontbeHatin April 28, 2005
This means that somebody is on the verge of anger, disgust, or surprise. They are questioning if you actually did/said that. A bystander may also say this in response to somebody who never really speaks up, and says a rude comment.
Chloe: Do you like my new outfit?
Abigail: Uh.. no. Not attractive.

Chloe: Oh no, you Didn't!
by Dude- What does dat mean? November 26, 2015
The name of the song used in the trailer for the recently released EA game, Mercenaries 2: World in Flames.
"Oh No You Didn't
Sucker tried to play me
But you never paid me, Never"
by Vegeta Himura September 5, 2008
The funniest, craziest, party game on the market. (Oh No You Didn't card game) This game gives your team 20 seconds to guess four words. 5 points for each correct word. Get them all right in 20 seconds and you keep the points. Miss one, and the whole room of opponents start wagging their fingers and shouting, "OH NO YOU DIDN'T." But, in order 2 take your points they must first pull a "Challenge" card and follow the rules on the card. (Miss a turn, Add 5, 10, 15 points to your score, Take 5 points from each team, etc.) They then have to pull a "Word" card and have 20 seconds and MUST guess all four words correctly. If they miss all four, every one is laughing, finger wagging and shouting Oh No You Didn't to them. If they get them all in the 20 secs, they get 20 points and take the other teams points. (15, 10, or 5 points) First team to 300 points wins the game. Crazy laughter, and accommodates up to 40 players easily. The ultimate party game. www.ohnoyoudidntgame.com
We had a great time playing OH NO YOU DIDN'T at our house Friday night.
by Game Creator September 20, 2018
A term used to express disbelief after being fragged during a deathmatch computer game such as HalfLife 2 Deathmatch. Must be pronounced ghetto style, by leaving out the second "d" in the word "didn't"
(right after being shot in the back by a dart gun at long range)

"Oh no you Di'n't! I'm gonna fuck you up with the rocket launcher now..."
by StoneGhost April 13, 2005