I was trying to bake a cake but I made a right pig's ear of it.
I tried to fix the car but made a pig's ear of that too.
Then, I decided to put up a bookshelf but it fell down - I made a pig's ear of that as well.
So, you've probably got the idea now that to make a pig's ear of something is to make a mess of it.
In looking for a video with the term pig's ear, I came across something I didn't know.
It seems that some people just love to eat pigs' ears. It's not for me but if you'd like to try them, here are two videos; the first lady is very enthusiastic about them and in the second video, you can see how to prepare them - seems surprisingly complicated and probably, I'd make a pig's ear of it.