turn a blind eye
Pronunciation:
verb
Definitions
To ignore or deliberately overlook, especially with respect to something unpleasant or improper, to look the other way. To knowingly refuse to acknowledge something which you know to be real.
Example: The mother turned a blind eye to her son’s mischief as she expected him not to repeat it.
Synonyms:connivelook the other wayshut one's eyeswink