Mary Poppinsy adjective1 •Resembling or characteristic of the Mary Poppins book series and its adaptations or their eponymous protagonist, a magical English nanny.Robert Stigwood’s “Times Square” was, hands down, the pits, not only tasteless but loathsome for it’s^([sic]) Mary Poppinsy misrepresentation of the sleazy 42nd Street strip. — 1980 formsmore Mary Poppinsy · most Mary Poppinsy