(verb) - The act of erasing everything you are about to say on Facebook chat.
This causes the person at the other end to know you're about to say something, and that for them to say something would be like interrupting a face to face conversation.
Usually occurs when fblirting or heated conversation.
also fbackspacing
You're about to say, in an attempt to go on a first date;
An expression when you think you've waited long enough or tried long enough to accomplish something and you finally get what you want. Originally a typo, some UK based people felt the need to continue the use of the word in broader contexts. Nowadays it is used beyond its purpose in an effort to take the piss out of those who still manage to accidentally mistype in this fashion.
'Fubakky, my fucking pizza's ready MEIGHT!'
'Fubakky I've sorted out all my questionnaire results'
'I have fubakky lost my virginity'
Fback means to follow someone back on Instagram or Twitter, for example if someone ask you "fback?" they are asking you to follow them and they will follow you back in return.