make a dog's breakfast (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 breakfast of the whole thing.

Common Names:

Name	Pronounced	Usage
Arnott	['a:nət]
Abd Al-Latif	-	Arabic
Caecilia	-	German, Ancient Roman
Rick	RIK	English
Sadie	['seidi]
Christobel	-	English (Archaic)