* A typo or abbreviation: There might be a typo, and the intended word is something else.
* A specific term within a particular context: The phrase might be used within a specific community, group, or cultural context where "CDT" has a unique meaning.
To understand the meaning, I need more information. Could you please provide:
* The full sentence or context where you encountered this phrase: This will give me more clues about the intended meaning.
* Any other information about the source or background: Is it from a book, movie, song, or conversation? Knowing where you heard it can help.
Once I have more context, I can help you understand the meaning of "CDT" in "brother in the land."