get/sink your teeth into something

 Sink (get) your teeth into something.
 
Значение: to start/ to do something with a lot of energy and enthusiasm. Взяться с энтузиазмом/интересом за что-то новое.

Примеры:  His new role as a villain gave him something that he could sink his teeth into.

The new project is really interesting. Can't wait to sink my teeth into it.

My wife has been telling me to get my teeth into some social work.

At the moment I’m looking for some interesting kind of character to sink my teeth into.

I’m anxious to sink my teeth into the new book by Chuck Pahalniuk. I really liked ‘Fight Club’ and I’ve heard that his newest book is even better!

My dad quit his job yesterday. He said he needed something he could sink his teeth into, and the job he had wasn’t it. I hope he can find a new job soon.