a pearl of wisdom

an important piece of advice

Usage notes: This phrase is usually used humorously to mean the opposite.

Thank you for that pearl of wisdom, Jerry. Now do you think you could suggest something more useful?

Name	Pronounced	Usage
Yakov	YAH-kahf (Russian)	Hebrew, Russian, Bulgarian
Wieland	-	German, Germanic Mythology
Rusul	-	Arabic
Madalena	mə-də-LE-nə	Portuguese
Parisa	-	Persian
Shakeel	-	Arabic