I don't know if there's any direct translation, but I can give you an idea of what that means in this case.

This question is usually used when you didn't get a reply you wanted to hear, either if someone didn't put in enough information or said something to just make you lay off of them.

In this case he didn't even answered the initial question!

- Why were you whispering with him over there?
- Nothing serious, there's no need to even recall that. He has a nice wardrobe.

So the one who asked the question needed to encourage him to answer the question.

My suggestions

-Oh, come on - Spit it out - Tell that already - Don't hold it back

Of course, as a native English speaker you can come up with your own variant of how to say that based on my explanation.

I hope that helps