also: くそどきょう
foolhardy courage; reckless bravery
Describes a boldness that borders on stupidity; often used in a negative or mocking tone. The prefix クソ adds emphasis, similar to 'damn' or 'stupid' in English.
He took on the challenge with nothing but reckless courage.
Because he has foolhardy courage, he does dangerous things without a second thought.
Most common spelling; uses katakana for the emphatic prefix クソ.
Hiragana variant of the prefix; less common but still seen.
Kanji spelling for くそ; rare and may be considered vulgar or overly literal.
Compound of the vulgar intensifier クソ (kuso, 'damn') and 度胸 (dokyō, 'courage'). The exact origin is uncertain, but it likely arose as a colloquial, emphatic expression.