in a nutshell Informal
Meaning: You can say "in a nutshell" if you're about to describe something as briefly as possible, or you're going to sum something up.
- It's a very complex situation, but the problem is, in a nutshell, a lack of sales.
- The president's in trouble and the reason, in a nutshell, is that people no longer trust him.
I'll give you the story in a nutshell because