An increasingly relevant wordplay on the cliché "cautiously optimistic". As the world continues in free fall, its much more realistic to expect negative outcomes. Therefore, its much more pragmatic to maintain a cautiously pessimistic demeanor, rather than a cautiously optimistic one.
I saw this hot blonde chick with a tight little ass from behind, and wanted to take her to bone town, but then I saw she had some meaty calves and wasn't sure if it was a chick or a dude. Not wanting to give up too easily, I had to verify it was a chick. I was cautiously horny.
That presentation was caustrous, the presenter had no idea what he was talking about.
The exam was caustrous, I think I got half of the questions wrong