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English definition of “spiff sb/sth up”

spiff sb/sth up

US informal phrasal verb with spiff     /spɪf/ verb
to make someone or something look more stylish, or cleaner and tidier: He's really spiffed up his wardrobe since he started his new job.Cleaning and tidying places and thingsSmart and elegantAttractive
(Definition of spiff sb/sth up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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