noun
radiation obsession; person obsessed with radiation
Jocular, colloquial term that emerged after the 2011 Fukushima disaster. Refers to an excessive preoccupation with radiation effects, or a person who is overly anxious or fixated on radiation. Often used in online discourse.
彼は放射脳で、食べ物の産地を異常に気にする。
He's obsessed with radiation and is abnormally concerned about where his food comes from.
ネットには放射脳な人たちがたくさんいる。
There are a lot of people online who are obsessed with radiation.
Compound of 放射 (radiation) and 脳 (brain), modeled after terms like マザコン (mother complex). The exact origin is uncertain, but it gained currency in online communities after the 2011 Fukushima nuclear accident.