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

 

sex up

 phrasal verb
phrasal verb
 
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Phrasal Verbs

sex somebodyup

(informal)
 
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to make someone feel sexually excited

sex somethingup

(informal)
 
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to make something seem more exciting and interesting The profession is trying to sex up its image.
See the Oxford Advanced Learner's Dictionary entry: sex up