(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.
When someone barely gets hurt and they are "injured" all of a sudden; one who overexaggerates injuries and illness to receive special treatment and pity.
"Oh my god did you hear about Dalton? He hit his head and got a really bad concussion!"
"Nah bro, you know he's just got lyin' little bitch syndrome"