make a dog's dinner (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 dinner of the whole thing!

Common Names:

Name	Pronounced	Usage
Voss	[vɔs]
Sonja	ZAWN-yah (German), SON-yah (Finnish)	German, Dutch, Swedish, Norwegian, Danish, Icelandic, Finnish, Slovene, Serbian, Croatian, Macedonia
SimÃO	-	Portuguese
PaŬLo	POW-lo	Esperanto
IÑAki	-	Basque
Gershon	GUR-shahn (English)	Biblical, Biblical Hebrew