The excerpt is from the top answer on 知乎:
再加上「真假TV」里爆出来的,什么每天用老公的牙刷刷马桶,把排泄物混到料理里微笑着看他吃下去之类的,可以拿去回答「人性到底可以有多阴暗」了。
According to MDBG dictionary:
什么 what? / who? / something / anything
I guess the 什么 here means "what the hell" or something like that. So the meaning of the entire sentence is something like the following:
How can she use her husband's toothbrush to brush a toilet every day
But is my understanding correct here? What is the meaning of 什么 here and can it be used as such? Maybe more explanations about the usage in general would be helpful.