also: ぼうこひょうか
noun
foolhardy courage; reckless bravery
A yojijukugo describing rash, thoughtless courage—charging a tiger barehanded or crossing a river without a boat. Often used critically to contrast with true, considered bravery.
暴虎馮河の勇は、真の勇気とは言えない。
Foolhardy courage like charging a tiger barehanded cannot be called true bravery.
彼の行動は暴虎馮河に過ぎず、計画性がまったくなかった。
His actions were nothing more than reckless daring, with no planning whatsoever.