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fluff sth up

phrasal verb with fluff
 
 
/flʌf/ verb [T] (US also flub) informal

Definition

to make something appear bigger or full of air by hitting or shaking it: I'll just fluff up your pillows for you.Enlarging and inflatingBecoming biggerShaking, swinging and vibrating
(Definition of fluff sth up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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