Definition of church key in English:

church key

noun

North American
  • A small metal device with a triangular point at one end for punching holes in cans and a rounded edge at the other end for removing bottle caps.

    • ‘So like the ubiquitous beer can opener (aka: church key) of old, looks like screw drivers and such might soon be headed for some dusty shelf in the Smithsonian.’
    • ‘I have one of the tiny squeeze button lights on my chain along with an ever necessary church key.’