Useless Fucking Information. A term often used in military settings, or anywhere there is bureaucracy. Refers to boring, generally useless information, often handed out against the wishes of the recipient.
Bob: Did you go to the meeting today?
Fred: Yeah, the director just gave out some UFI about next week's conference.
gimpB0y: dude, you didn't follow me on Twitter.
dude: no way, Twitter is too much UFI.