* A misspelling or a variation of a different term. Perhaps you meant "clapper dungeon" or "clapper dudgeon." If you can provide more context, I might be able to figure out what you are looking for.
* A regional or dialect term. If you heard it in a specific location or from someone who speaks a particular dialect, that could be the reason it's unfamiliar.
* A made-up term. Sometimes people use unique words or phrases for fun, creativity, or satire.
To help me understand what you are looking for, please provide:
* The context in which you encountered the term. Where did you hear or read it?
* What you think it might mean. Do you have any guesses based on how it sounds or was used?
With more information, I can try to find out the meaning of "clapper dudgeon."