A fork of Rural Dictionary
Facebooking Under the Influence.
"Dude, I should get an F.U.I. I got on Facebook last night after the party and called my X a cheating whore on her wall!"
Stands for "For Your Information"
Mother: I bet you have been the whole evening with your friends.
Daughter: pfff, f.u.i, i was at the library studying
Facebooking Under the Influence.
The modern equivalent of the Drunk Dial.
When you wake up to find that you or one of your friends has posted comments that they would usually censor.
Last night I got caught F.U.I. again, that photo of my nipple was supposed to be a private message not a wall post.