What is the meaning of Proverbial?

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

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

Widely known; famous; stereotypical.

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

The groin or the testicles.

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Source: wiktionary.org