gunge /ɡʌnd͡ʒ/noun 2verb 2forms 3 noun2 •(UK, Ireland) A viscous or sticky substance, particularly an unpleasant one of vague or unknown composition; goo; gunk.Have I got trails of gunge on these frills? — 1978 •(informal) Tholin.They call this solid material tholin (after the Greek word for muddy), but it seems likely that chemists will continue to call this rather familiar material “gunge.” — 1979 verb2 •(UK) To cover with gunge. •To clog with gunge. formsgunged · gunging · gunges