Here's why:
* "Credo" means "I believe" in Latin.
* "Madeo" means "to be wet" or "to drip."
* "Pedo" is a slang term for a child or young person, often used in a derogatory way.
Putting these words together doesn't create a grammatically correct or meaningful Latin phrase.
It's possible that this is a fabricated phrase intended to be humorous or nonsensical.
If you encountered this phrase in a specific context, please provide more information so I can help you understand its intended meaning.