Definition of get or take or have the bit between or North American in one's teeth in English:
Begin to tackle a problem or task in a determined or independent way.
- I've got the bit in my teeth with this show and I'm very determined to take it as far as it will go.
- Mencken believed that the human race would accomplish greater things if the halt and lame were left to themselves and the bright and swift took the bit between their teeth.
- And one of the big questions is whether he's going to be able to really get the bit in his teeth.