Translation-Friends with benefits- the words basically explains itself... Friends that are usually both single; that do "stuff" together as in sex, making out etc.
Friends With Benefits The best thing a man can ever ask for: you get a nice caring friend, sex and free sammiches AND you don't have to have kids or live with her. What else could you desire?
Right after the lecture I am going to my fwb to get some freesammiches and have some nice sex.