tomboy [ˈtɔmˌbɔɪ] noun 【英语解释】a girl who enjoys rough, noisy activities traditionally associated with boys 爱玩闹的男孩子气的女孩 【例句】His daughter is a saucy tomboy. 他女儿是一个调皮的假小子。

Mary has always been a tomboy. She likes hiking and horseback riding. 玛丽一直很男子气，她喜欢远足和骑马。

boyish [ˈbɔɪɪʃ] adjective 【英语解释】of, like, or characteristic of a male child or young man 男孩（似）的；孩子气的 【例】his boyish charm. 他那男孩般的魅力。

she looked boyish and defiant. 她看起来像男孩，而且很倔强。

This girl likes to have her hair cut in a boyish style. 这个女孩喜欢把自己的头发剪成男孩的发型。

His classic boyish looks seemed to proclaim his good humour and openness. 他的长相非常孩子气，显得性情很好且诚实坦率。

trying to hide the boyish enthusiasm bubbling up inside him 尽力掩盖在他体内燃烧的孩子般的热情 ------------------------------可见 tomboy 比 boyish 多了 naughty 的含义。

tomboy = naughty boyish。