脳筋 のうきん Meanings Noun muscle-brain; meathead; hot-blooded idiot; person who charges in before thinking Kanji 脳 brain. Read as ノウ. 筋 muscle. Read as キン. Words containing 脳筋 ミトコンドリア脳筋症 (ミトコンドリアのうきんしょう) mitochondrial encephalomyopathy 脳筋症 (のうきんしょう) encephalomyopathy Word lists Slang Jinuma: Japanese Dictionary · Word lists