In that context I would take it to mean a friendly response from someone who understood your joke and that you were kidding. No sarcasm. Just a smiley face.
>>>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.
Charles Hankey
Though a good deal is too strange to be believed, nothing is too strange to have happened.
- Thomas Hardy
Half the harm that is done in this world is due to people who want to feel important. They don't mean to do harm-- but the harm does not interest them. Or they do not see it, or they justify it because they are absorbed in the endless struggle to think well of themselves.
-- T. S. Eliot
Democracy is two wolves and a sheep voting on what to have for lunch.
Liberty is a well-armed sheep contesting the vote.
- Ben Franklin
Pardon him, Theodotus. He is a barbarian, and thinks that the customs of his tribe and island are the laws of nature.
