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general::
Phrase(s): 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!
McGrawhill's American Idioms And Phrasal Verbs