sink (one's) teeth into (something)
To start doing or become involved in something with one's utmost energy, determination, or enthusiasm. I'm always looking for a great book to sink my teeth into. I'd like you to sink your teeth into this new project I'm developing.
sink one's teeth into
Also, get one's teeth into. Become fully engaged in, as in He couldn't wait to sink his teeth into that problem. This metaphoric expression alludes to an animal biting vigorously into its prey. [Early 1900s]
get/sink your ˈteeth into something
(informal) put effort and enthusiasm into something that is difficult enough to keep you interested: This job is too easy. Why can’t they give me something I can really get my teeth into?sink one’s teeth into something
verbSee get one’s teeth into something
sink (one's) teeth into
Informal To undertake an endeavor energetically: She sank her teeth into the challenging project.