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English definition of “spiff sb/sth up”

spiff sb/sth up

US informal
verb uk phrasal verb with spiff   /spɪf/ us  
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.
(Definition of spiff sb/sth up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of spiff sb/sth up?
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