Top Definition
When two people you are engaging in coitis the male genitalia disengage the vagina and enter the anus swiftly much like a slam dunk in basketball.
Male Friend 1- "So the other night i was having sex with this girl who had a huge ass..."
Male Friend 2- "Did you give her a trunk dunk?!?!?"
Male Friend 1- "Yep, she was shocked at first, but fell in love with it shortly after."
by ChetBroda May 25, 2012

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.

×