What is shmunguss?

"Shmunguss" doesn't appear to be a term or concept with a widely recognized or established meaning as of my last update in October 2023. It's possible that it could be a slang term, a local term, or something specific to a niche community or recent trend. If it's a recent development or from a very specific context, I might not have information on it. Can you provide more context or details about where you encountered this term?