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
Napoleone	-	Italian
Martim	-	Portuguese
AlÍCia	-	Catalan, Portuguese
Khloe	KLO-ee	English (Modern)
Cathy	['kæθi]
Oral	-	English (Rare)