dig in

verb

1. military to create (a defensive position) by digging foxholes, trenches, etc
2. informal.
   to entrench (oneself) firmly
3. informal.
   intr to defend or maintain a position firmly, as in an argument
4. informal.
   intr to begin vigorously to eat

   don't wait, just dig in

5. dig one's heels in informal.
   to refuse stubbornly to move or be persuaded

Example Sentences

But he kept digging and digging in the hopes, Kimmel says, of trying to get under the skin of the oft-inscrutable Carson.

From Los Angeles Times

Southampton's players have to realise that you have to dig in at times - and he epitomised that.

From BBC

“So it was really interesting for me to dig in and learn about not only Nora’s history and her life, but her friendships, her relationships with people, her mentees.”

From Los Angeles Times

“If they are publicly identified, the celebrity will likely dig in and deny all charges and fight until the end,” he said.

From Los Angeles Times

The hosts were caught between hitting themselves out of trouble and digging in.

From BBC