Definition of guck in English:

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Pronunciation: /ɡʌk/


[mass noun] North American informal
A slimy, dirty, or otherwise unpleasant substance: he got mud and cow guck all over his white jersey
More example sentences
  • Run the air-conditioner, that can filter some of that guck out - that's a scientific term.
  • It was easy to get away from him now, and when I saw his face with that creamy guck stuck to it I forgot about being scared and wanted to laugh.
  • The strips gave me what seemed to be amazing initial results, but they pulled out less and less guck with repeated use.


Mid 20th century: possibly a blend of goo and muck.

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