to get the bit between one's teeth
01
本腰を入れる, やる気満々で取り組む
to begin doing or taking part in something with enthusiasm and determination
![to [get|take] the bit between {one's} teeth definition and meaning](https://cdn.langeek.co/photo/42414/original/?type=jpeg "to [get|take] the bit between {one's} teeth definition and meaning")
例
He can be lazy about doing his work, but when he gets the bit between his teeth there's no stopping him.
彼女が本腰を入れたら、誰も勢いを止められなかった。
