Lampshade Hanging (or, more informally, "Lampshading") is the writers' trick of dealing with any element of the story that seems too dubious to take at face value, whether a very implausible plot development or a particularly blatant use of a trope, by calling attention to it and simply moving on.

https://tvtropes.org/pmwiki/pmwiki.php/Main/LampshadeHanging

Calling themselves out on how ridiculous the situation is, basically.

I also never heard it before, probably should have, here's the first part of the definition from TV tropes:

"Lampshade Hanging (or, more informally, "Lampshading") is the writers' trick of dealing with any element of the story that seems too dubious to take at face value, whether a very implausible plot development or a particularly blatant use of a trope, by calling attention to it and simply moving on."

It’s not a long book but it is for me very frustrating to read.

It’s about an optimist who keeps dismissing the shitty things happening to/around because it’ll all work out.

I just did not enjoy reading it at all.