He's been working like a fiend all week.
2 seconds sound clip from the In a Lonely Place movie soundboard.
You can hear this line at 00:53:33.440 in the DVD version of the movie.
Quote context
[...]
- That's enough, Martha. Get out!
- Get out.
- Oh, I love a picnic. Acres and acres of sand, and all of it in your food.
- Stop griping. Just lie still and inhale.
- No, air. And don't let it go to your head.
- He's been working like a fiend all week.
- I've always been curious to know how a writer works.
- Usually in a sitting position.
- That's wonderful! Not cold at all.
- What I meant was, does he usually have the story mapped out before he starts?
- If you don't, you're in awful trouble, unless you have my gal friend here as inspiration.
[...]