What does FBF mean?

FBF is a popular hashtag on Instagram, used when users post photos of flashbacks (word for things that have happened in the past). Photos that users upload may be things like baby pictures, childhood memories, or even something that occurred the week before. ‘Flashback Fridays’ also occur on social media sites like Facebook, Twitter, or Tumblr, and are basically the same. Flashback Friday is very similar to TBT, or Throwback Thursday, which is essentially the same thing with a different name.

#FBF = Flashback Friday