* A slang term or idiom specific to a particular region or group: If you heard this phrase in a specific context, it's likely a local or group-specific slang term.
* A misheard phrase: It's possible you misheard something else.
* A made-up phrase: Perhaps it was a creative expression used for humor or a specific situation.
To figure out the meaning, you would need more context:
* Where did you hear it? A specific location or group can help narrow down possibilities.
* Who said it? The speaker's background might provide clues.
* What was the context? The situation around the phrase will offer insight into its intended meaning.
Without more information, it's difficult to determine the meaning of "muck and Meyer." Please provide more context if you want help understanding it!