expression, i-adjective
hard-nosed; strong-willed; unyielding
Describes a person who is assertive, determined, and not easily swayed; often carries a nuance of stubbornness or pushiness. The expression derives from 鼻っ柱 (bridge of the nose) being strong, metaphorically indicating a forceful personality.
See also: 鼻っ柱が強い
She is strong-willed, so she speaks her mind clearly.
あの新人は鼻っぱしが強くて、先輩にも平気で反論する。
That new employee is so assertive that he even argues with his seniors without hesitation.