Construct Question (-てどうする)

[Banana]

Hello everyone!
みんなさんこんにちは！

I'm new here, and have recently come across a grammar construct that has given me some confusion. The construct in question is formed by adding "どうする" after the "て form" of a verb, as in ([動詞]てどうする). I know the "て form" links two verbs together, similar to an "and" between two verbs in English, as well as that "どう" means "what/how" and "する" is the dictionary form of the verb "to do," but I'm having trouble wrapping my head about what it all means together in English.

From what I can gather, I think it might express that the former action is futile or not worth one's time, though I may be horrendously wrong. If you have an explanation, an example sentence or two would be wonderful.

Any and all help is greatly appreciated.
よろしくお願いします！

[richvh]

Checking some entries in Eijiro on alc, it looks like you've got the general idea right.

[Ongakuka]

I was about to respond with an example using that grammar, but that would have been really rude

It's casual speech that can be used to tease, chastise, criticize and sometimes mock another person.