get / take the bit between one's teeth

/ɡɛt tˈeɪk ðə bˈɪt bɪtwˌiːn wˈɒnz tˈiːθ/

/ɡɛt tˈeɪk ðə bˈɪt bɪtwˌiːn wˈʌnz tˈiːθ/

to get / take the bit between one's teeth

to begin doing or taking part in something with enthusiasm and determination

Examples

1. She wasn't that interested at first, but she loved it once she got the bit between her teeth.

2. He can be lazy about doing his work, but when he gets the bit between his teeth there's no stopping him.

3. Taking the bit between his teeth he set off across the plain with greater speed than the bones of his anatomy ever gave any promise of.

4. Liverpool have got the bit between their teeth here, the crowd are willing them on and the players are responding.