The acronymn for a song by Phish, a popular jam band that doesn't usually have songs featured on the radio, as they are too long. The song is titled "You enjoy myself" and is 9 minutes, 50 seconds as a studio-recorded single. It has only a few lines of lyrics, which have been deliberated over by many generations of Phish phans. The lyrics appear to be "Boy. Man. God. Shit... Wash uffize, drive me to Firenze." Uffize is rumored to be something similar to "your feetsies" and "Firenze" is a region in Italy. Legend has it that when Phish was in Italy, they were splashing around in a fountain, perhaps leading to the second verse of this song.
It is a classic song played by Phish at many concerts, originally on the 1988 album "Junta".
Man, the live YEM at the concert last month was ten times better than the studio version.