Halsey paid a visit to Australian radio station triple j, swinging by the Like A Version segment for an interview and live performance. Like the BBC Radio 1 of down under, the station asked Hal and her band decided to cover a current radio hit.
Apparently FCC rules are a bit different in the island continent, because she managed to turn Justin Bieber's family-friendly hit "Love Yourself" into "Fuck Yourself," which seems like a very Halsey thing to do.
What's remarkable about the change is that it works, in both interpretations: it could be a kiss off, it could be about masturbation. It just makes sense.