From Longman Dictionary of Contemporary Englishget your teeth into somethingget your teeth into somethinginformalSTART DOING something to start to do something with a lot of energy and determination I can’t wait to get my teeth into the new course. → tooth
Examples from the Corpus
get your teeth into something• We were both the sort of people who just can't let go once they have got their teeth into something.• Once the gila monster gets its teeth into its prey it will not let go.• But meanwhile, her new role as fashion supremo is something she can really get her teeth into.• That O'Neill man isn't going to let up now he's got his teeth into it. 