lose reason

lose reason

To become insensible; to lose the ability to think rationally or logically; to be unable to reason. A possessive pronoun can be used between "lose" and "reason." My brain was so addled with drugs that I completely lost reason. What is going on with the boss's decisions lately? It's like she's lost her reason.
See also: lose, reason
Farlex Dictionary of Idioms.

lose one's reason

Fig. to lose one's power of reasoning, possibly in anger. I was so confused that I almost lost my reason. Bob seems to have lost his reason when he struck John.
See also: lose, reason
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • lose ground to (someone or something)
  • give/lose ground
  • lose ground
  • lose it
  • lose it, to
  • lose one's shirt, to
  • lose (one's) head over (something)
  • lose head
  • lose your head
  • lose one's head
References in periodicals archive
"These disgruntled groups will lose reason [to fight] if there is good implementation of the peace process,"A Hataman said.
Implementation more critical than BBL's passage-ARMM chief
Commenting on a statement by French President Francois Hollande about possible military intervention in Syria, Denisov said "One should not lose reason and actual vision of what is happening in Syria," adding that the talk about any foreign intervention is a reflection of political emotions more than analysis and calculation.
Gatilov: We Are Categorically against Any Intervention in Syrian Conflict from the Outside
However, if the resident US forces lose reasons to protect Japan against the North, reduction of US bases in the country will be subject to review, same as South Korea.
Trump-Kim summit may change East Asian security situation
The Pig will not lose reasons to celebrate, which means the Pig is going to have a very busy year--socializing, partying, etc.
Any luck?