* A misspelling: Perhaps you meant "ttyl" which is an internet slang abbreviation for "talk to you later".
* A specific term within a particular context: If you encountered this term in a specific situation, please provide more context. For example, where did you see it (e.g., a website, a chat, a document)? This will help determine the correct meaning.
* A made-up term: It's possible that "ttywl" is a term that was created for a specific purpose or community.
To clarify the meaning of "ttywl", please provide more details about where you encountered this term.