Non-PRO English to Greek Other Idioms / Maxims / Sayings idiom

I entered this as a note under 'thank you very much!' (used sarcastically). But the translation of this expression is perhaps worthy of a separate entry. I thought that perhaps a mere 'να! might serve the purpose.
Its meaning is similar to that of 'thank you very much!' in the sense that it is an emphatic filler, adding greater emphasis to the previous statement.
-eg: I am right, and you are wrong. So there!
It is usually said when someone is trying to make a point and is done with arguing and is sure that they're right so they say "so there" to finish the argument.
Such people believe they are right and thinks they have just delivered a valid point.
-e.g. 'Effy stood her ground. "Well, I think you're stupid, so there!"'
It is not quite the same as 'thank you very much!' which is a preemptive conversational stopper; 'so there!' is a phrase which stresses the speaker's assumed correct viewpoint.