Songfacts®:

• Matthew Musto is an American rapper and record producer who records under the name of Blackbear. His songwriting credits include Justin Bieber's 2012 hit single "Boyfriend" and a couple of tracks from G-Eazy's These Things Happen album. This song is his first Hot 100 hit as a recording artist.
• This vindictive kiss-off finds Blackbear channeling his frustration with his conceited and self-centered girlfriend. When asked by Billboard magazine if any female fans might be put off by such direct broadsides, the rapper explained, "It's kind of like watching Mean Girls. A lot of drama in LA, a lot of talking, a lot of telephone. That's Hollywood."
• The chorus is a play on the "Solfège" harmonic scale commonly used in music education to teach pitch. However it is a complete contrast with the innocent lyrical message famously sung by Julie Andrews in The Sound of Music.
  
  Do, re, mi, fa, so f---in' done with you, girl
  So f---in' done with all the games you play.
  
  Solmization (or Solfège) is a system of notation whereby the musical notes of the diatonic scale are designated by syllables and manual signs. The system was introduced by Italian music theorist Guido d'Arezzo in the 11th century. His six-note ascending scale went as follows: ut, re, mi, fa, sol, la. "Ut" was changed in the 1600s in Italy to the open syllable Do, at the suggestion of the musicologue Giovanni Battista Doni, and Si was added to complete the diatonic scale.
• Blackbear channels his frustration with the failing relationship during this song. "I just remember in that relationship waking up and really just feeling like nothing was good enough," the rapper expressed to Genius. "Even though I would do anything for that person."
• Do, re, mi, fa, so f---in' done with you, girl
  
  "I'm just a witty kind of guy," said Blackbear. "I'm really obsessed with one-liners and if you go to my Twitter page, now you won't find many pictures or retweets or anything. It's usually just one sentence. I'm obsessed with saying everything in one line. It's what I do it for. I'm obsessed with it."