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church key

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noun Slang.
  1. a small metal can opener having a sharp triangular pointed end for punching holes in the top of a beverage can, as of beer.
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Origin of church key

First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for church key

church key

noun
  1. US a device with a triangular point at one end for making holes in the tops of cans
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012