It was one that had to do with his "girlfriend" I've listened to all the songs on Dark Horse but it was none of those songs on that album.
The chorus, you can barely understand what he's saying. I remember something in the chorus.. He said something about never knowing if she's drunk or if she's high; going back to their place and fcking.
That's all I can really remember. If this was real life, I would be able to tell you the tune of it. Lol.