(v.) -- to gaze stupidly or in open-mouthed surprise or wonder at someone from another generation for doing or saying something completely surprising or incomprehensible due to the generation gap.
"Whenever I say something old-fashioned to my teenage sons, they just look at me in a totally befuddled way and then generation gape at me in wide-eyed wonder. 'Oh Dad, please!' is what they are thinking, I'm sure!"
When your sister posts naked pics of herself on the internet, then claims you don't understand the industry she is in.
-Hey Fred, out in L.A., we use those pics for our industry, you just don't understand! There must be a Generational Gap.
-But Rebecca, you work in Social Media!
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. PenguinBooks,1992. p. 38)