crackpot
🇺🇸
/ˈkrækpɑːt/
🇬🇧
/ˈkrækpɒt/
having very unusual or unreasonable ideas
His crackpot theories about aliens were met with laughter.
彼の奇妙な宇宙人についての理論は笑い者にされた。
a person with very unusual or unreasonable ideas
The professor dismissed the student as a crackpot.
教授はその学生を狂人だと見捨てた。