Billie Eilish December 3, 2018 by SMF · Published December 3, 2018 · Last modified September 17, 2020 Meaning of “Bellyache” by Billie Eilish “Bellyache” is the title of a 2017 song by American singer Billie Eilish. In “Bellyache”, the narrator (Billie) sings from the point of view of a dangerous psychopath. She has committed a very heinous...