A person who seemingly exists for the sole purpose of sharpening your wit. Analogous to a whetstone for knives. A witstone does not usually comprehend the subtleties of sarcasm, jokes, or human communication (especially the English language).
John said, "Everything I do makes this computer crash." When I replied that his breathing probably did not make the computer crash, he was confused. John is such a witstone.
by crosvenir March 18, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×