be-all and end-all is a noun meaning "the essential factor; the all-important element; the supreme aim". It carries one recorded sense.
the essential factor; the all-important element; the supreme aim
“profit is the be-all and end-all of business”
Definitions, synonyms and semantic relations for be-all and end-all come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.