There is also a very vivid usage of cat whiskers in Changsha dialect. We usually use it to describe something that is strange, unsatisfactory, or a little halfway. For example, if you hear two people quarreling, but they can't reach an agreement in the end, then you can say that the end of the quarrel is like a cat beard, which means it's over without result.
In addition to describing the long hair and unproductive things on people's faces, cat beard has a very practical usage in Changsha dialect. We sometimes say that a product or service has a lot of "cat beards", which means that the quality is defective or not worth spending too much money. This may happen when purchasing unqualified products or obtaining services from unreliable service providers.