A phrase used by a simple-minded person to demean the
creativity, efforts, interests and
achievements of another because they do not specifically relate to said simple-minded person's interests. While it is sometimes used when refering to a genuine
waste of time, generally its usage pertains to interests that are very much a legitimate way to spend time. There is nothing wrong with having hobbies, even if they aren't mainstream.
Note that this definition is not in reference or response to the previous definition.