Refers to boldness or fearlessness, often in the phrase 度肝を抜く (to astonish or startle someone). The word itself is a noun, but it is most commonly encountered in set expressions.
Variant using 胆 (gallbladder/liver) instead of 肝 (liver); both convey the idea of innards/guts.
どぎもUsage8%
ド肝Usage8%
Emphatic katakana ド plus 肝; the reading ドぎも is a natural voiced variant.
ドギモUsage3%
ドぎも
Etymology
Compound of 度 (ど, degree/extent) and 肝 (きも, liver/guts). The reading ぎも is a voiced variant (rendaku) of きも. The word figuratively refers to one's innermost courage.