Meanings
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1
noun
the back of the neck, especially the loose skin or fur there on an animal
He lifted the frightened dog gently by the scruff of its neck.
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2
noun
an untidy or scruffily dressed person
The doorman mistook the travel-weary professor for a scruff.
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3
noun
short, rough facial hair or stubble
Several days of dark scruff covered his chin.
Thesaurus
Etymology
The neck sense appeared in late eighteenth-century English, probably from dialectal scuff or related Germanic words for the back of the neck, withers, or head hair. The senses for an untidy person and rough facial hair are associated with scruffy and the idea of an unkempt appearance.