じゃじゃ馬 (jajauma) Japanese meaning: restive horse | KotomoraFreq.FrequencyTop 100,000 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.
She's been a tomboy since she was little, often getting into fights with boys.
My younger sister is a real shrew; nobody can handle her.
