>Hi everybody,
>
>If somebody would say:
>
>"You're such a riot", how this can be interpreted?
>
>Thanks in advance.

Depends on how they said or wrote it. For example...

"You're such a riot!" could imply that they are kidding you about something you said or did.

"You're such a riot." is probably sarcastic and they are not kidding you.

The context is also important. What else was being said at the time and all that. And who said it and your relationship with them.