talk to the hand
A saying used to ignore and disregard a comment or an insult when you can't think of a way to counter it. When this phrase is used, it is customary to raise your hand, palm facing out, and place it almost touching your adversary's face. This can make even the most civil person raging mad. Another variation is "talk to the hand 'cause the face don't give a damn'." I really did not know that people still said this.   
Misty: Kylee, you a nasty, ugly, stupid-
Kylee: Talk to the hand. (Raises hand to Misty's face.) 