nut·shell 
/ˈnʌtˌʃɛl/ noun
plural nut·shells /ˈnʌtˌʃɛl/ noun [count] : the hard outer shell of a nut
in a nutshell
: very briefly
▪ And that, in a nutshell, is what happened. ▪ To put it in a nutshell, the party was a disaster.
▪ And that, in a nutshell, is what happened. ▪ To put it in a nutshell, the party was a disaster.
