This is a word that usually describes a dumb jock at your school or workplace or one of those wiggas hanging around the skatepark.
regular person 1: "yeah, you would watch that wit ur mom"
regular person 2: "yeah, youre such a FD"
noun; an attractive male from a foreign country, often a country well know for the attractiveness of its males (ie. Australia, Ireland, etc.), and often sporting a sexy accent.
I totally slept with some FD last night.
This party sucks, theres no FD's.
It is rumoured that it means "facedown" as in a facepalm like gesture, but this is not confirmed.
It seems to have originated from a bunch of losers from Fletcher's Creek Senior Public School, and is now a common term used at the end of a sentence, similar to "xD", ":P", etc.
Basically if you use this term at the end of your sentences, clearly you're a frigggin' loser.
Girl 2: "omg shut the fuck up you type like a retard!"