Witcastic
To be both sarcastic and witty. To be witcastic, one would use "witcasm"
a girl: Don't mess with the new chick
her friend: why not?
a girl: If you say anything to her, she'll just be witcastic right back to you.
her friend: why not?
a girl: If you say anything to her, she'll just be witcastic right back to you.