* A misspelling: Perhaps you meant "mulish," which means stubborn or obstinate.
* A slang term: It might be a slang word or regional term, and its meaning would depend on the context or location.
* A word from another language: Could it be a word from a different language? If so, please provide more context so I can help you find the correct translation.
Please provide more information about where you encountered this word, so I can assist you in determining its meaning.