adjective
proverbial
pruh-VER-bee-ul/prəˈvɜːrbiəl/
Belonging to or resembling a familiar traditional saying.
The needle in the haystack is a proverbial image of a difficult search.

Etymology
A proverb is literally “words put forward,” understood as a common saying. Something proverbial is mentioned in, or resembles something in, such a saying and is therefore familiar or widely recognized.
In context
like slipping on a proverbial banana peel, metaphorically, and and totally doing the wrong thing, you know?
More examples
- Finding that receipt is like looking for the proverbial needle in a haystack.
- The extra fee is the proverbial last straw.
- Their crowded kitchen illustrates the proverbial warning about too many cooks.
Forms
proverbial
proverb noun — A short, familiar saying expressing practical wisdom.
proverbially adverb — In a way recalling a familiar saying.
Similar words
- aphoristic
- Resembles a concise statement of truth, without requiring traditional familiarity.