Definition of guck in English:



North American
  • [mass noun] A slimy, dirty, or otherwise unpleasant substance.

    ‘he got mud and cow guck all over his white jersey’
    • ‘I didn't want any of the guck to dry on my clothes.’
    • ‘It'll spray you with diesel oil and then sit there laughing while you run off trying to figure out how to get all that guck off yourself.’
    • ‘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.’
    • ‘Run the air-conditioner, that can filter some of that guck out - that's a scientific term.’
    • ‘The monster was panting, or whimpering or something, and the yellow guck was still spouting out of its severed limbs.’
    • ‘The strips gave me what seemed to be amazing initial results, but they pulled out less and less guck with repeated use.’
    • ‘The dishwasher fired the guck with a kiln like precision into something that could last for weeks.’
    • ‘They talked all the way back past the river of guck and back to their car.’
    mud, muck, mire, ooze, silt, alluvium, dirt, slime, slush, slurry
    View synonyms


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