Definition of presume on/upon phrasal verb from the Oxford Advanced American Dictionary

 

presume on/upon

 phrasal verb
phrasal verb
 
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Phrasal Verbs

presume on/upon somebody/something

(formal)
 
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to make use of someone's friendship by asking them for more than you should presume on/upon somebody/something to do something I felt it would be presuming on our personal relationship to keep asking her for help.