The swipe which is particularly cruel, as the Duke and Duchess have recently welcomed their first child, Archie Harrison, who was born on May 6.
And it's not the first cruel jibe the Duchess has had to deal with.
Royal aids have previously been reported to call Meghan a number of cruel names, including "Me-Gain", "Duchess Difficult" and "Hurricane Meghan".
Since marrying in May 2018, Harry and Meghan have moved away from William and Kate to Frogmore Cottage in Windsor.
They also split from the Kensington Palace household earlier this year, as well as creating a separate Instagram account in April to detail their lives and the work they are doing.
All of which have fuelled rumours of a royal feud between the Sussexes and the Cambridges, and done nothing to enhance Meghan's reputation.