Definition of "proverbial"

Of, resembling, or expressed as a proverb, cliché, fable, or fairy tale.  quotations  examples

Not used in a literal sense, but as the subject of a well-known metaphor.  examples

Widely known; famous; stereotypical.  examples

(euphemistic) Used to replace a word that might be considered unacceptable in a particular situation, when using a well-known phrase.  examples

(euphemistic, in the plural) The groin or the testicles.  examples