A fo five is a .45 caliber handgun. This could be anything from a Colt 1911A1 to a newer Smith and Wesson third generation pistol. A fo five is a pretty big ass bullet, that you don't want no parts of (unless you're not on the recieving end).
by Your Father February 05, 2005
Random Ugly Bitch. A game played by guys in which the whole group looks around a room, then stares at the RUB until they either blush or go away. IF she stays they walk over and say to her shes ugly;if she runs they yell it out. Either way its fun.
by YoUr FaThEr March 22, 2003