1 definition by Angela/Patrick/Ronald/Craig/Others

Top Definition
The act of spontaneously putting your thumb in someone's butt. The word comes from the sound it makes when inserted.
When the unsuspecting girl bent over I thunked her.

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.