To be in agreement with someone. It can be used in place of the word "Yes". A short version of 10-4. Can be used by raising your four fingers at someone.
by Steve Mogavero September 22, 2005
Karen and I did number four last night. Luckily, as it is not number five, we can still be just friends.
by Victor Sanchez May 14, 2006
The first number I could find that hasn't been defined here. There are some crazy-ass definitions for one, two and three I can tell you!
Four is the number after three and before five.
Four is the number after three and before five.
by Detrius521 February 27, 2005
A reference to "four out of ten" as a 'rating' for girls. Used especially to signify a lack of talent in the vicinity.
by Nick 3000 May 24, 2005
by Sara W. July 31, 2006