"Once Ago" is a song by UB40, and the lyrics depict a person who has gone through a breakup or a difficult end to a relationship. The narrator of the song expresses their desire for the other person to leave and move on with their life. Although they once adored this person, their feelings have changed, and they no longer need their love. The chorus emphasizes the narrator's decision to let go and live their own life while wishing the other person good luck and saying goodbye. They anticipate seeing the person around sometime and advises them to be wise and remove their disguise of love. Overall, the song portrays the end of a relationship where the narrator has reached a point of acceptance and wants the other person to move on and find their own happiness. It expresses a sense of independence and detachment from the past.