骨頂

こっちょう【骨頂】

¶ → 愚の骨頂

¶ → …と言うなんて愚の骨頂だ

* * *

こっちょう【骨頂】

the height 《of…》.

●愚の骨頂 the height of folly [idiocy]; sheer [pure, utter, downright, unadulterated] folly; total [complete] idiocy

・無駄の骨頂 an utter [a complete, a total] waste 《of time》.

●あんな仕事に手を出すとは馬鹿の骨頂だ. It is utterly stupid [You're completely crazy, 《文》 It is the height of folly] to get involved in a job like that.