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
Mariona	-	Catalan
Anand	-	Indian, Hindi, Marathi, Tamil, Telugu, Malayalam, Kannada, Gujarati, Bengali
Tiffani	TIF-ə-nee	English
NiccolÒ	neek-ko-LO	Italian
Hayim	-	Hebrew
Melusine	-	Mythology