Pig's mickey 

To make an absolute mess of something so that the final result might resemble a huge, smelly, messy, post-coital pig's penis.

I made a right pig's mickey of that job my boss gave me to do.

Pig's mickey by jobo76 September 30, 2011

pigs micky 

To make a complete and utter balls of something

Thats a all wrong you've made a pigs micky out of it

pigs micky by DAVRAV July 27, 2006