Assumpthole 

An asshole that assumes a bunch of things that are wrong, attacks other people based on their incorrect assumptions, and then feels victimized, justified, and/or smug about it all

That assumpthole thought I voted for Trump, insulted me for 5 mins straight, and then stormed out of the room… I voted for Hillary.

Assumpthole by FrozenBadger March 26, 2022

Assumehole 

An aggressive attacker on an issue spewing hatred at every response as if it was a direct and personal opposition.

Just don't engage an assumehole they will loose steam after a while when getting ignored.

Assumehole by The 80/20 rule July 28, 2017

assumptioner 

One who hails (comes) from the Catholic school Our Lady of Assumption

There are a lot of assumpionters at my school.

assumptioner by Anonymous October 4, 2003

assumptioneer 

An assumptioneer is someone who works in a field very similar to that of an engineer but they do not have tons and tons of accurate data available to make decisions so they have to make lots of assumptions, hence this makes them an assumptioneer - doing assumptioneering work.

Project Manager - How is the work progressing on the facility design?
Design Manager - Jon has been struggling with a lack of data but as we all know he is a great assumptioneer
Project Manager - ok as long as we clearly document all our assumptions in a concept document should be fine for now

assumptioneer by cj2017 December 9, 2017