Plural of dandriff; multiple instances or collections of those white skin flakes.
Standard plural of the variant spelling dandriff, formed by adding -s. Though typically dandruff is uncountable (you don't usually count individual flakes), the plural can be used to mean multiple cases or manifestations of the condition.
Dandriffs is odd because dandruff is usually uncountable—like 'water' or 'sand'—you don't usually say 'dandruffs' or 'dandriffs.' But if this plural exists in the dictionary, it might be used for things like 'different dandriffs from different people,' showing how even mass nouns can go plural in creative ways.
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