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
Frannie	FRAN-ee	English
Fryderyk	fri-DER-ik	Polish
Olabode	-	Western African, Yoruba
Paulo	-	Portuguese, Galician
Roseanne	ro-ZAN	English
Purcell	['pə:sl]