presumer

/prɪˈzuːmər/
noun
  1. A person who assumes something to be true without proof or authority.
    • As a presumer of good intentions, she always gave people the benefit of the doubt.
    • The presumer of the theory later admitted he had no evidence.
    • The presumer claimed the treasure was buried under the old oak tree.
  2. A person who acts with excessive confidence or boldness, often beyond what is appropriate.
    • He was seen as a presumer for interrupting the CEO during the meeting.
    • The young intern was no presumer; she always waited her turn to speak.
    • Only a presumer would ask such a personal question on the first date.
Antonyms
What does "presumer" mean? | whatsthatwordmean | whatsthatwordmean