This occurs when a person hears a song on the radio, hummed or sung by someone else nearby, with the end result being that your mind repeats the song over and over again until it is forgotten or superceded by another song.
"As few seconds after Chris started humming the theme to 'Team America', the words 'America... Fuck yeah!' repeated in my head. It was then that I knew I'd been song-fucked, and would need to cleanse my palate with another song or play a video game to get my mind off that damn song."
by odieodieo September 1, 2009
A folk song that includes obscene lyrics, two examples being "The Necrophiliac Song" ("My name is Jack, deedle ack, deedle ack, I'm a necrophiliac...") or "Barnacle Bill the Sailor"; a bawdy song.
by pentozali December 19, 2011
*the song "what's my name again" by blink 182 starts playing, a key example of a what-da-fuck song*
Jim: what the fuck?
Jim: what the fuck?
by chordie March 22, 2009