빈 수레가 요란하다더니 · 빈 수레가 요란하다고
empty vessels make the most noise (lit. an empty cart is noisy)
Example
빈 수레가 요란하다더니, 자기 자랑만 하던 사람이 실력은 별로였어요.
Empty vessels make the most noise: the guy who did nothing but brag about himself wasn't very good.
Word parts
요 disturb+란 disorder
An empty cart rattles and clatters, while a loaded one rolls along quietly.
Good to know
A criticism of people who boast or talk big without real ability. Matches the English 'empty vessels make the most noise'.