It's not the word itself, which is grammatically correct word for, well, shrinkage, but the context in which it applies. Words do evolve together with their newly-acquired context, and Seinfeld can be attributed to have helped with some.
Your comment likely means that you actually don't really understand what is the shrinkage we talk about here ;)
Your comment likely means that you actually don't really understand what is the shrinkage we talk about here ;)