To be "shook to the core," you simply can not fathom something resulting you to be in a state in which you can not easily speak other words than "shook to the core." This is a verb used to properly demonstrate your feelings towards something or someone's actions or state of being.
Gabriel: "Did you see what he just did?"
Human: "Yeah, I am surprised!"
Gabriel: "I am Shook to the core! I can't believe it!"
Human: *nods in confirmation*
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)