double standard
ˌdouble ˈstandardBrE 
NAmE 
nouna rule or moral principle that is unfair because it is used in one situation, but not in another, or because it treats one group of people in a way that is different from the treatment of another
ˌdouble ˈstandardBrE NAmE nouna rule or moral principle that is unfair because it is used in one situation, but not in another, or because it treats one group of people in a way that is different from the treatment of another
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