The song "What Is This Thing Called Love" by Editors explores a deteriorating romantic relationship. The lyrics suggest that the relationship has reached its breaking point, with both individuals acknowledging that they have tried their best but failed to make it work. The singer emphasizes that they have been each other's lover and support for the last time. They mention pretending and trying, indicating that they have put effort into the relationship but couldn't overcome their issues. The line, "I knock you down, bruise you with my words, I patch you up, now it's your turn," suggests a cycle of hurting and healing within the relationship. Both partners have hurt each other, but they have also supported one another in the past. The repetition of the question, "What is this thing called love that you speak?" highlights their confusion and disillusionment with the concept of love. They feel that they are no longer in love or connected on a deeper level. The metaphor of building a city and tearing it down represents the foundation they built their relationship on, which is now crumbling. The analogy of a fight coming to an end and hearing the bell ringing in the final round signifies that the relationship is no longer salvageable. Overall, the song portrays a relationship that has run its course, with both individuals realizing that they are "out of" love. They question the meaning and significance of love, highlighting their disillusionment and the end of their relationship.