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dirt fishing

American  
[durt fish-ing] / ˈdɜrt ˌfɪʃ ɪŋ /

noun

Slang.
  1. the act of using a metal detector, especially as a hobby or pastime, as on a beach or in a park or field, in search of coins or artifacts.

    If it’s Saturday and it’s not raining, Seth is probably off somewhere doing a bit of dirt fishing.


Etymology

Origin of dirt fishing

First recorded in 2010–15