is a track from Taylor Swift's tenth studio album, Midnights (3am Edition) , released on October 21, 2022. Co-written and produced with Aaron Dessner, the song explores themes of emotional neglect, the breakdown of a long-term relationship, and the complex morality of finding a new connection before the old one has officially ended. Lyrical Meaning and Wordplay
The title is a clever pun on "High Fidelity" (Hi-Fi), a term for high-quality sound reproduction. By swapping "Fidelity" for "Infidelity," Swift contrasts the technical perfection of sound with the messy, imperfect nature of human faithfulness.