>>>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.
>
>Here is the exact context
>
>http://forums.asp.net/t/1369221.aspx
>
>I'm just not sure what would riot mean if applied to the person. I looked it up in Wikipedia, but don't see it as an idiom.

In that particular context, he is complimenting you on your sense of humour. Often it is a sarcastic remark, but the way I read it there, it is not.