put in a nutshell
put it in a nutshell
To summarize or describe something in only a few words. To put it in a nutshell, the servers are crashing because of an issue with our power supply. Let me put it in a nutshell for you—if you show up late again, you're fired!
put something in a nutshell
Fig. to state something very concisely. (Alludes to the small size of a nutshell and the amount that it would hold.) The explanation is long and involved, but let me put it in a nutshell for you. To put it in a nutshell: you are fired!