in a nutshell

US /ɪn ə ˈnʌt.ʃɛl/
UK /ɪn ə ˈnʌt.ʃɛl/
"in a nutshell" picture
1.

in the fewest possible words; briefly

:
•
To put it in a nutshell, we're bankrupt.
•
Can you explain the whole situation in a nutshell?