Describing a woman who is strong-minded, spirited, or somewhat mannish — emphasizing robustness, assertiveness, or lively character.
彼女は男勝りで、重い荷物も平気で運ぶ。
She is very spirited and has no problem carrying heavy luggage.
女優はその男勝りな役で一躍人気を得た。
The actress gained popularity with that mannish/robust role.
子どもの頃から男勝りの性格で、はしごに登るのも平気だった。
Since childhood she was spirited and didn't mind climbing ladders.