Top Definition
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."
by Hanukkah Monica Veronica May 10, 2011

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