Popsy (foaled 7 October 1990) is a Thoroughbred racehorse who won the New Zealand Derby in 1993, one of very few fillies to have achieved the feat. In a stunning season for the Matamata training stable of Dave and Paul O'Sullivan in three-year-old races, Popsy brilliantly beat the males in the Derby at Ellerslie while her stablemate Snap outclassed her opposition in the Oaks at Trentham. In 16 races in New Zealand, Popsy was unplaced only three times. She won twice at Group 1 level, following up her Derby win with a victory against fillies later in the season.