What Does friends with benefits Mean? By the 1990s, friends with benefits was an established term for two friends who have occasional casual sex. Interest in the phrase spiked in 2011 with the release of the rom-com Friends with Benefits, starring. Mila Kunis and, justin Timberlake. Translation for friends with benefits in the free English-Polish dictionary and many other Polish translations. Friends with benefits - Polish translation - English-Polish dictionary 11 Rules of Being Friends With Benefits - Glamour So you want to embark on a friends-with-benefits relationship? Great, as long as you know what you re getting into. Here s how to navigate. 2 close friends who think it would be fun to have sex with each other again and again.