Short for Follow Back Pro-EU. This is used by Twitter users to indicate that they support being part of the European Union.

Some people write this in their bio or in their Tweets and the hashtag has gained a lot of popularity in the UK after the Brexit vote to leave the EU. However, it is also used more widely in Europe too.
Make sure that you #FBPE users if you want to show your support for the EU.
by BeansofEnergy August 20, 2019
Get the #FBPE mug.
Self-hating left-wingers who hate England for no reason and make up pure lies about the country.
FBPE
by SapphireBW July 31, 2022
Get the FBPE mug.