F4J /ˌef fɔː ˈdʒeɪ $ -fɔːr-/ Fathers 4 Justice /ˌfɑːðəz fə ˈdʒʌstəs $ -ðərz fər-/ (abbreviation F4J) a political organization in the UK, started in 2003, that campaigns (=organizes a series of actions intended to achieve a particular result) for the rights of divorced fathers in Britain. Fathers 4 Justice is well known for organizing protests which bring them attention from the media.