Thunderfuck was one of the names - among Nixon, Helldriver, Blitzer and a multitude of others - which James Hetfield, Dave Mustaine, Ron McGovney and Lars Ulrich considered for their young band in 1982. At the same time, their friend Ron Quintana had created a heavy metal fanzine and hesitated between a few names for it, one of which happened to be "Metallica". Lars and James thought this would be a proper name for their band and persuaded Quintana to call his magazine "Metal Massacre" instead.
Thunderfuck is also the last song on The Wildhearts album Endless, Nameless (1997).
Metallica LIVE - http://www.metlive.com/
Playboy interview with Metallica (April 2001) - http://www.metalworld.org.uk/pbinterview.htm
FiveMilesHigh - http://www.fivemileshigh.com/html_discography/wildhearts-endless.htm