No you, Also known as No U.
Dumbest comeback known to man, YET most effective.
It reflects Teh PWNAGE (Look that up) back to the sender.
Bob: Yo Tom, you Teh Small Cox, HAHA!
Tom: No you.
Possibly the greatest comeback ever devised. Although it seems childish it was originally used to almost parody the usual immature responses in mature arguements with immature people.
It was brought to popular use from the popular Machinima, Masterchief Sucks At Halo 3/Arby and the Chief
Matt: Why dont you just stop being such a little kid?
Tom: Why dont you just die?
Matt: No you
Ultimate come back used for any situation.
This come back was created by the great Bryan who we believe is a border line genius.
(Jesse) Hey bryan i did you sister last night.
(Bryan) NO YOU!
A retort to "you are", the the mid-level retaliatory responce.