What do you reply with when someone calls you a "Newb/Noob"?

[Mad Cat]

THATS NOT WHAT YO MAMMA SAID, OMG LOLZ0rzzzzzzzz!!!!!!111111111111111111111111

[GepperRankins]

"meh"

[rzf]

I usually just do:
/slap
/duel
/s Bring it biatch!

[neon]

i kill them and say in global chat.
"WHOS THE NOOB NOW BITCH YEAH BITCH WHOS THE NOOB NOW BITCH!!"

and i keep saying this coz it gets them pissed of and they want to kill you back, and if they cant they will leave garenteed

[slim150]

now.. i say,

"hey your checks in the mail", or "hey you should go pro"

(ie sarcastically telling them that the thing they are good at is a worthless skill)

[rnichilo]

i get called a hacker in CS all the time, but definitely never called a noob lol