If you heard someone use "swarley", here are a few possibilities:
* Misspelling: It could be a misspelling of a word like "swarthy" (meaning dark-skinned), "swirly" (a type of swirling pattern), or "squirrely" (meaning strange or eccentric).
* Slang: It might be a slang term specific to a particular region or group. Without more context, it's impossible to say what it means.
To understand the meaning, you'd need more information:
* Context: Where did you hear this word used? Who said it? What was the situation?
* Definition: Does the person who used it have a definition for it?
Let me know if you can provide more context, and I might be able to help you figure out what "swarley" means.