In passing

We mostly talked about his mother's illness, but he told me in passing that he'd won a small prize in the lottery.

Did she mention my name just in passing?

And that number, 400 million[subscribers], does not account for the people who watch MrBeast’s videos in passing, or who are aware of his cultural presence because of their children, or who just sort of know who he is but don’t have any intricate awareness as to why he is famous.