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
Secundinus	-	Ancient Roman
Ensio	EN-see-o	Finnish
Mira (2)	-	Bulgarian, Macedonian, Slovene, Croatian, Serbian, Polish
Jabril	-	Arabic
Petrus	PE-truws (German)	Dutch, German, Biblical Latin
Ophrah	AWF-rə (English)	Biblical