English edit

Etymology edit

From Cornwall.

Pronunciation edit

Noun edit

tommyknocker (plural tommyknockers)

  1. (folklore) A mythical creature, like a brownie or leprechaun, believed to live in underground tunnels; later associated with dead miners.
    • 2006, Thomas Pynchon, Against the Day, Vintage, published 2007, page 335:
      Then he's down one of these adits, talking to the tommyknockers, more'n likely.