(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;
Someone who makes excuses not to go to previously planned engagements; someone who blows people off to do other things or because they don't "feel" like it; an unreliable person. Comes from the word flake pronounced wrong one day.