Psycho" is a song recorded by American rapper Post Malone, featuring guest vocals from American singer Ty Dolla Sign. It was written by Sign, Malone and Louis Bell, with production handled by the latter two. The song was released through Republic Records on February 23, 2018, as the third single from Malone's second studio album, Beerbongs & Bentleys (2018).[1][2][3] Lyrically, the song discusses Malone's lifestyle and explores the theme of excessive fame and trust issues.[4][5]

Post Malone first teased the song on January 4, 2017, with a video of him playing the song in a studio.[6] On February 21, 2018, Post Malone previewed the song on Twitter with a 30-second snippet,[7] which highlights Malone's verse.[8] The accompanying artwork features a wolf and a bulldozer, the latter of which has the words "Posty Co." scribed on it.[9] The song comes with its own merch line, featuring three different long sleeve T-shirts.[10]

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