Friend request.

Often used on Xbox Live or gaming forums.

FR is a sorter way of saying "For real"

“Fr” is an abbreviation for “For Real” usually used in texts and online

Friend Request - commonly used to ask someone to friend you in games, programs etc.

There's only two ways you can say "fr".

1. Out of pure shock/disbelief.

2. Someone you don't really care about is talking to you and they something semi-interesting but not interesting enough for you to care but you don't want to hurt their feelings so you just go "oh, fr?" with ur tone in voice going slightly up.