a king's ransom

a large amount of money A visit to one of those amusement parks can cost a king's ransom.

Usage notes: often used with worth or cost, as in the example

a very large amount of money (not used with the ) She was wearing a diamond necklace which must have been worth a king's ransom.

Name	Pronounced	Usage
Sanjana	-	Indian, Hindi, Marathi
Kameron	KAM-rən, KAM-ə-rən	English (Modern)
Siddharth	-	Indian, Hindi, Marathi, Gujarati
Catherine	ka-tə-REEN (French), ka-TREEN (French), KATH-ə-rin (English), KATH-rin (English)	French, English
Shaynah	-	Yiddish
Wilburh	-	Anglo-Saxon