Wittyastic
An adjective describing one who is humorous using both wit and sarcasm. They are both witty and sarcastic in their statement.
A man is wittyastic in his response to a question:
Girl: "Are you sure you're not gay?"
Guy: "I'm sure."
Girl: "Positive?"
Guy: "As a proton."
Girl: "Are you sure you're not gay?"
Guy: "I'm sure."
Girl: "Positive?"
Guy: "As a proton."