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burn sth off/up

phrasal verb with burn
 
/bɜːn/
 
US  /bɝːn/ verb (burnt or burned, burnt or burned)

Definition

B2 to use or get rid of energy or fat by doing a lot of physical exercise: Running is an excellent way to burn off excess calories.Exercising and training
(Definition of burn sth off/up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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