Definition of crud noun from the Oxford Advanced Learner's Dictionary



BrE BrE//krʌd//
; NAmE NAmE//krʌd//
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any dirty or unpleasant substance Word Origin late Middle English: variant of curd (the original sense). The earliest modern senses, ‘filth’ and ‘nonsense’ (originally US), date from the 1940s.
See the Oxford Advanced American Dictionary entry: crud