FOMO is an acronym for Fear Of Missing Out which is essentially what the song is about. The song tells the tale of a guy who has a thing for a woman who has had her fair share of intimate relationships. However the main character in the story is reluctant to pursue the woman in question because she has previously been intimate; however, she is now showing a mutual interest in our main character. This has led to a predicament where our main character has an ever growing lust for the female character but refuses to act on it due to his morals and will unfortunately be feeling FOMO for the foreseeable future until he decides to take action.