irrationable
A combination of irrational and unreasonable.
Jack, stop being so irrationable and go get me a mini-milk.
Pi’s Irrationality
When the number π uses its celebrity status in popular culture to push other mathematical constants or beloved numbers around so that they remain out of sight to the lay public, who might otherwise discover their hidden beautiful numerical or geometric properties.
Some numerical rebels like 0, √2, e, i, and 𝛷 have ganged together to protest against pi’s irrationality—they wanted π to be censored for its bullying behaviors and condescending attitudes vis-à-vis fellow mathematical constants and geometric figures.
irrationalize
To explain behavior or attitude with illogical, implausible reasons.
"Because my closest friends will be there", she said, "everyone I most like spending time with", explaining why she refused to go to the party. He could counter any reasonable explanation with facts, but hearing her irrationalize, he became flummoxed and just gave in.
irrationalization
The paradoxical outcome of excessive rationalization (efficiency, mass production, etc) in contemporary society
These mass produced, 99 cent, omnipresent umbrellas from China are a great example of irrationalization in contemporary society.