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
Jurre	-	Frisian
Yasmine	YAZ-min (English)	Persian, Arabic, English (Modern)
Haim	-	Hebrew
Chesley	CHES-lee	English
Vartolomej	-	Serbian (Rare)
Savage	['sævidʒ]