Top Definition
A thousand million. Often confused with a billion, however a thillion is the preferred usage for those with lisps or other interesting speech impediments.
I seriouly have a thillion special things to start sometime this saturday.*

*lisp included
by Jackie J. April 15, 2008

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.

×