Wiktionary
do what
interj. (context idiomatic colloquial English) An intensified version of what? or huh?, expressing surprise or lack of comprehension
Usage examples of "do what".
Alternatively, you can simply walk over to them, rip their swimsuits off, and do what you like with them.
Even though he's the one with privileged access, now, he still tends to do what I say.
If we are forced to do what it seems we must, in my opinion, we will be in direct violation of the noninterference directive.
You will be able to think what you wish, say what you wish, do what you wish.