Usually an answer given when you don't 1. Give a shit 2. When you are trying to be polite by not saying no shit. 3. A smartass answer given to someone who just stated something very obvious or very stupid. Can be used in a number of ways.
Hey man have you seen those new Dodge Challengers? They are really fast. OH REALLY?
Synonym to-No shit sherlock
More polite version
P1: Did you know that birds fly?
P2: Oh really.
Decadent term, or form, for the expression also known as "O'RLY?" usually represented by a white owl.
Note: Only use this form when talking to a lawyer or brit.
Player1 = OMG OMG OMG, Today I tottaly PWND a lvl 60 Epic character!!!!!
Player2 = Oh Really?
Note: use "O'rly?" instead
Lawyer: The acused is the murderer as he was the only one present at the time of the murder and has his fingerprints on the murder weapon.
Jury thinks: Oh really?
Note: This situation involves a lawyer, therefore the term is "Oh really?" and not "O'Rly?" even if the jury isn't saying it out loud.
A derogatory term, used when questioning an authority.
"You can't park here!" - 'Oh really?!'
"Yeahh i saw that last night too" - 'Oh really?!'