(With reference to a question tag) the property of being negative when the preceding clause is positive (e.g. this is good, isn't it?), or vice versa (e.g. this isn't any good, is it?); frequently attributive.
Origin
1950s.
Definition of reversed polarity in US English:
reversed polarity
noun
Grammar
(With reference to a question tag) the property of being negative when the preceding clause is positive (e.g. this is good, isn't it?), or vice versa (e.g. this isn't any good, is it?); frequently attributive.