sink teeth into
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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 a new project that I'm developing.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
sink (one's) teeth into
Informal To undertake an endeavor energetically: She sank her teeth into the challenging project.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sink one's teeth into, to
To become fully engaged or engrossed in something. The analogy in this term, which began to be used figuratively only in the early twentieth century, is to the animal that bites deeply and vigorously into food. Dorothy Sayers used it in Gaudy Night (1935), describing a scholarly effort: “If one could work . . . getting one’s teeth into something dull and durable.”
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer