Kate Middleton, who has won several accolades for her vibrant personality and people-friendly demeanor, remained composed in the face of William's nasty words.
Kate Middleton's tolerance was put to the strain during her undergraduate days when William's friends and other classmates made humorous and unpleasant comments and mocking gestures.
Kate Middleton, who now has the title of Princess of Wales, remains endearingly down-to-earth to those in her close circle, including the Prince and her own family, who affectionately refer to her as Catherine.
However, it has been revealed that before she became a member of the royal family, his'snooty' pals gave her an unpleasant nickname in reference to her mother Carole Middleton's previous job as a British Airways flight attendant.
According to reports, some of William's buddies would sneakily mutter "Doors to Manual" in reference to Kate, royal expert Katie Nicholl said on the Vanity Fair Dynasty podcast.
Katie went on to praise the Princess for her respectful answer to them, saying: "To her full credit, Kate never rose to it - the snootiness of the upper classes levelled at what they called the en-masse Middletons."
There's no question that the mean-spirited appellation wasn't water off a duck's back, but one assistant told the Sunday Times Magazine that Kate recalled: "It was never water off a duck's back, but she has extraordinary character and resilience." I've never witnessed or heard of her loosing her anger."
Since marrying Prince William in 2011, the mother of Prince George, Princess Charlotte, and Prince Louis has become an important member of the royal family and is on her path to becoming Queen consort.
When the Princess of Wales appeared at the Chelsea Flower Show and was questioned by a schoolgirl about what it's like to be a royal, she delivered a refreshingly honest five-word response: "You have to work hard".