I’m Curious: What Words or Phrases Have You Incorporated from Books?

Inspired by a fun Twitter convo started by David S (@BookMeanderings) (of FanFiAddict)

What’s something from a book or author that’s made it into your everyday vocabulary?

For me:
I picked up on a lot from Nero Wolfe: pfui, flummery/flummox, and a handful of his repeated phrases. Also, whenever I use “indeed”—which I do more often than you’d imagine—I hear his assistant, Archie Goodwin’s, line:

“Indeed,” I said. That was Nero Wolfe’s word, and I never used it except in moments of stress, and it severely annoyed me when I caught myself using it.

So I’m not sure if I’m using indeed because of Wolfe or Archie.
I’m pretty sure I picked up, “we’d be fools not to,” from Spenser.
I’ve tried to work in phrases from Gregory McDonald’s I.M. Fletcher and Francis Xavier Flynn, but I haven’t found much success at that (but I make myself smile when I do, a little joke only I get—which is a very Flynn thing to do).
I recently added “boy howdy,” to my repertoire following Walt Longmire, mostly to avoid using words I try not to. Many of which I picked up the pronunciation used by Roddy Doyle’s characters in the Barrytown trilogy.
Of course, every time I say nothing. That’s me quoting (or not-quoting) Jack Reacher.

I know that list is incomplete, but it’ll do for a start. I’ll try to add to it as more comes to mind. What about you? We’re all word aficionados here, right, I’m sure I’m not alone. Are there any that you’ve tried to add and failed?

Looking forward to hearing from you.