Wach besse7 jouhar kaywled?

This is a serious question. I hear that if the pearls are real "kayweldou". And when I ask what that means no one gives a satisfying answer. So my question is what exactly do people mean when they say kayweldou? Like if you leave for example 10 pearls atrje3 atl9ahoum wlaw 12 wla what exactly? And of course is it true wla is it a myth?