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
Thales	-	Ancient Greek
Laelia	-	Ancient Roman
Reece	-	Welsh
Asya	AH-syah	Russian
Alajos	-	Hungarian
Matilda	mə-TIL-də (English), MAH-teel-dah (Finnish)	English, Swedish, Finnish