* A personal code or abbreviation used within a specific group or context.
* A misspelling of a different acronym. Perhaps you meant to type something else?
* A random combination of letters without any particular meaning.
To help me figure out what it means, please provide more context:
* Where did you see this acronym? (e.g., online, in a text message, on a document)
* What was the conversation or topic about?
With more information, I can try to determine what "TTGYL" stands for.