If you're trying to find a real word, you might be thinking of one of these:
* Colloquial: This refers to informal language used in everyday conversation.
* Sociology: The study of society, its structure, and how people interact.
* Ecology: The study of the relationships between organisms and their environment.
Could you please clarify what you meant by "cagology"? Perhaps you can provide more context or the source where you saw this word.