In slang what does you saying mean?

"You saying" is not a common slang phrase. It's more likely a grammatical error, where someone is trying to say:

* "You're saying..." - This is a more formal way of asking someone to clarify what they are trying to say. It's often used in situations where there's some confusion or misunderstanding.

* "What you saying?" - This is a slang way of asking someone to explain themselves, often used in informal settings. It could also be used to ask someone what they think or how they feel about something.

If you can provide more context, I can help you understand the intended meaning better.