It is about a past relationship, while in “You should be sad” Halsey expresses her frustrations about a previous relationship. In “killing boys” she expresses her break with pride, the song shares some similarity with “Nightmare” of it. It’s about what a woman should be after a breakup, be a strong and independent woman.

In addition to the track being interpolated in the intro, part of the 2009 horror film “Jennifer’s Body”, protagonized by Meghan Fox and Amanda Seyfried.