Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending
to become stupid from associating with stupid people; to be infected with stupidity
ColloquialUsually written using kana alonesee 移る
馬鹿が移るまえにそのような宗教に関わらんほうがいい。You should stay away from cults like that before you turn into a moron.
Also written 馬鹿が移る【ばかがうつる】、バカが移る【ばかがうつる】