hunker down to
hunker down to (something)
To work or begin to work on something in a determined matter. I can't believe I didn't get an A on my project after I'd hunkered down to it all weekend!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
hunker down to something
Fig. to apply oneself to something, to get started working at something. I hunkered down to my chores, hoping to get them done before noon. If you want to get a good grade on that report, you'd better hunker down to it.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.