Definition of pump up phrasal verb from the Oxford Advanced American Dictionary

 

pump up

 phrasal verb
phrasal verb
 
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Phrasal Verbs

pump somebodyup

[usually passive]
 
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to make someone feel more excited or determined

    pump somethingup

     
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  1. 1to fill a tire, etc. with air using a pump
  2. 2(informal) to increase the amount, value, or volume of something Interest rates were pumped up last week.
See the Oxford Advanced Learner's Dictionary entry: pump up