sink one's teeth into

Idioms  

1. 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]

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Example Sentences

“There are plenty of data to sink one’s teeth into, not only in historical research but also in just the last few years, when there has been a huge volume across disciplines.”

From Nature

His movie had attracted strong supporters who marveled at the sense of style and rigor but also some laments that it was hard to sink one's teeth into.

From Los Angeles Times

Putting two and two together only yields four, no matter how often it's done, but two to the eighth power gives a nice, round two hundred fifty-six, which is something one can sink one's teeth into.

From Project Gutenberg