means a personal affair or private concern that you are not required to share with other people if you don't want to. In a nutshell, think of it as something like privacy. The second meaning of turusi refers to an objective piece of information such as a fact or something like a trade secret.
For example, most of the time Zimbos will use this word as follows:
And that means: you should mind your own business and drink more water instead of being a nosy person who wants to know everything about everyone's personal gwans."Sha, mind your turusi"
Here is an example of the second meaning:
And that means: I am not going to discuss trade secrets about how I get my stock at reasonable prices, lest they run me out of business by figuring out my reliable sources of supply."Vanhu vanobvunzisa kwandino hodha zvinhu manje ini handibuditse turusi rangu kune povho."
Note: Another synonym for turusi is hokoso which only means the same thing as the first given explanation in this post.