What is "tommyknocker"

n. (context folklore English) A mythical creature, like a brownie or leprechaun, believed to live in underground tunnels; later associated with dead miners.

Tommaso Marra (born January 20, 1977 in Rome, Italy), best known as Tommyknocker, is a Hardcore producer and DJ.

Tommyknocker or Tommyknockers may refer to:

• Knocker (folklore), a mischievous spirit associated with mining in Welsh, Cornish, and Devon folklore, known in the U.S. as Tommyknockers
• The Tommyknockers, a 1987 science fiction novel by American writer Stephen King
  • The Tommyknockers (TV miniseries), a 1993 TV miniseries adapted from the Stephen King novel
• Tommyknocker (producer) (1977– ), a hardcore techno producer and DJ
• "Tommyknockers", a track on the 1990 album Tales from the Twilight World by German metal band Blind Guardian
• Tommyknockers (root beer), a brewery based in Idaho Springs, Colorado, United States