adjective
presumptuous
prih-ZUHMP-choo-uhs/prɪˈzʌmptʃuəs/
Too bold or self-assured without proper permission or respect.
The presumptuous guest takes the head chair and reaches for the host's plate.

Etymology
Here “taking beforehand” connects with taking liberties or taking too much upon oneself. Presumptuous describes someone whose confident assumptions overstep the limits of propriety or good sense.
In context
Too often we barge into God’s presence with presumptuous “to-do lists” for Him, without being mindful of His holiness
More examples
- Calling your new boss by a nickname seems presumptuous.
- I hope this question isn't presumptuous, but may I join you?
- His presumptuous demand for special treatment annoys the staff.
Forms
presumptuous
presumptuously adverb — With excessive boldness or inadequate respect.
presumption noun — Bold behavior that oversteps proper limits.
Similar words
- impertinent
- Emphasizes rude disrespect, especially toward someone in authority.
- arrogant
- Emphasizes an exaggerated sense of superiority rather than overstepping permission.
- forward
- Emphasizes excessive familiarity or eagerness, without necessarily implying disrespect.