'I know my body is a big part of my brand and that comes with the territory, but it's hard to maintain my ideal weight all the time for year after year.
It comes from an episode in which Jerry Seinfeld's friend Elaine believes his new girlfriend - played by Teri Hatcher - has breast implants.
The golfer responded by posting a picture from her Maxim shoot with a horse's head Photoshopped
Spiranac - who had her first win as a professional in 2016 and missed out when she attempted to qualify for the LPGA tour in August of that year
has amassed an incredible following online, where her golf tips and glamorous posts have made her a social media superstar.
She has also hit out at Aussie golf legend Greg Norman's controversial LIV breakaway competition, which is backed by mountains of Saudi Arabian cash.