not your father's

== English == === Alternative forms === not your dad's === Etymology === From an advertising slogan for the Oldsmobile car, "this is not your father's Oldsmobile". === Pronunciation === === Phrase === not your father's (idiomatic) Recently changed, made unconventional through modernisation. ==== Usage notes ==== Being idiomatic the phrase can take a number of forms: mother's and parents' can be substituted for father's, as can regional and dialectal synonyms such as dad and papa.