QUOTE (witesoxfan @ Jun 9, 2014 -> 12:27 PM)
FB is a pretty common abbreviation for Facebook. I'm guessing they either have different wordings for Facebook and Twitter and they use these abbreviations to differentiate between them. Normally when they get C&P'd to these social networking sites, they will remove this. They merely forgot to.
Or it could stand for Fartbreath Noesi, which is really an incredibly terrible thing to say, but at least they abbreviated it.
I guess they didn't add "Hector" either