It is possible that it is:
* A misspelling: Perhaps the intended word was "callados," which means "silent" or "quiet."
* A regional term: There might be a specific regional or dialectal meaning in a particular area of Spanish-speaking countries.
* A specific context: The meaning could depend on the context in which it is used.
To help you understand the meaning, please provide more context:
* What is the full sentence or phrase?
* Where did you encounter this word?
With more information, I can help you determine the correct meaning.