Plural of dimp; a dialectal or archaic term for dimples or small indentations.
From dialectal 'dimp' (a variant of dimple) plus plural '-s'. This appears in regional English dialects and historical texts.
Dimps is the kind of word you find in old regional dictionaries from Northern England, where every dialect had slightly different names for the same things—linguistic archaeology showing how scattered English communities developed their own vocabulary.
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