* A misspelling or a variation of a different phrase: It's possible that the intended phrase is something similar but spelled differently. If you can provide more context or the source where you encountered this term, I might be able to help.
* A slang term or regional dialect: It's possible that "Mu Mitha" is a slang term or a phrase specific to a certain region or community.
* A fictional or made-up term: It's also possible that this phrase is part of a fictional universe or a made-up language.
Without more information, it's impossible to determine the meaning of "Mu Mitha." Please provide any additional context or the source of this term so I can assist you further.