Top Definition
A painfully long and boaring movie. See: Oliver Stone's Alexander. (better yet don't) Also the name of reviewer Harry Knowles annual film marathon and birthday bash.
Use as an observation: "That movie was one buttnmbathon".

Or mix it up: "That movie was one son-of-a-buttnmbathon"
by Squidmo February 11, 2005

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.

×