" Turn a blind eye "
Meaning:
Refuse to acknowledge something that you know is genuine.
Example:
I knew where my grandson was hiding nut I decided to turn a blind eye and let him have his fun.
Where did it originate?:
Britain, early 19th century. Most probably directly related to Nelson's refusal to view an unwelcome signal.
Where is it used?:
Hear the idiom spoken:
