X.Y.U.

"X.Y.U." is a song from The Smashing Pumpkins' third studio album, Mellon Collie and the Infinite Sadness. It is one of the heaviest songs on the album along with "Fuck You (An Ode To No One)" and "Tales of a Scorched Earth". The song was recorded in one take, live for the record with drum and vocal overdubs added later. The title means "Ex, Why You?", but is also a play on the spelling of Russian obscene word "хуй" (pronounced "hu:i") that is translated as "penis".

The song originated from jamming, so like "Silverfuck" it evolved in several forms over the years. An alternate version dubbed "X.Y.U. (Take II)" was included on the 2012 reissue of Mellon Collie and the Infinite Sadness and featured different lyrics. Another alternate version called "X.Y.U. Medley" was recorded live at Dodger Stadium, Los Angeles on October 31, 1998. It bundled a variation of the song with teasers of "The Ethers Tragic", "Where Boys Fear to Tread" and "Never Say Never" (by Romeo Void). The recording was included on the 2014 reissue of Adore.