じゃじゃ馬うま

noun

restive horse; unruly horse

Literal meaning: a horse that is difficult to control, often bucking or refusing commands.

• あのじゃじゃ馬うまはなかなか言いうことを聞きかない。

  That restive horse won't do what it's told.

noun

unmanageable person; shrew; stubborn tomboy

Idiomatic use, especially for a strong-willed, unruly woman or girl. Often carries a slightly humorous or affectionate tone.

• 彼かの女じょは小ちいさい頃ころからじゃじゃ馬うまで、男おとこの子ことよく喧けん嘩かしていた。

  She's been a tomboy since she was little, often getting into fights with boys.

• うちの妹いもうとは本ほん当とうにじゃじゃ馬うまで、誰だれも手てがつけられない。

  My younger sister is a real shrew; nobody can handle her.