that is treated as a suffix to a sentence for no apparent reason.
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.