Article continues below advertisementPrince William is said to be using a brutal two-word phrase behind closed doors to slam his shamed uncle Andrew Windsor-Mountbatten - who sources say palace aides are mocking as a "creepy commoner" now that King Charles has stripped him of his royal titles.Insiders say future monarch William's withering assessment of the former Duke of York, 65, captures the deepening rift between the pair as William, 43, prepares to take the throne from his cancer-stricken father.