make a dog's dinner (of something)

To make a mess of or completely ruin something. I thought I could trust Jim to finish the business proposal, but he made a dog's dinner of the whole thing!

Common Names:

Name	Pronounced	Usage
Lalita	-	Hinduism, Indian, Hindi, Marathi
Yawen	-	Chinese
Rebecca	rə-BEK-ə (English), re-BEK-kah (Italian)	English, Italian, Swedish, Biblical, Biblical Latin
Amalasuintha	-	Ancient Germanic
Methuselah	mə-THOO-zə-lə (English)	Biblical
TÖMÖRbaatar	-	Mongolian