make a pig's ear of
US /meɪk ə pɪɡz ɪər əv/
UK /meɪk ə pɪɡz ɪər əv/

1.
to do something very badly
:
•
I really made a pig's ear of that presentation.
•
He made a pig's ear of the repairs, so we had to call a professional.
to do something very badly