buckled down

Its great the way he, and in fact all the fellows have buckled down to work.

All of her best friends are Scouts, and she certainly has buckled down to work well.

I always wanted to see what a hermit lived like when he's really buckled down to the hermit business.

With wild cheers the men responded and buckled down to the grueling task.

When he saw how truth and justice lay, he buckled down and did the square thing.