Definition of presume on phrasal verb from the Oxford Advanced Learner's Dictionary

presume on

phrasal verb

presume on/upon somebody/something

(formal) to make use of somebody’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.
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See presume on in the Oxford Advanced American Dictionary

noun

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