generation gasp
(n.) -- the sighing sound one hears on both sides of the generation gap when one side says something the other side just doesn't quite agree with
"You know, every time I talk to my dad, he says a few things that just bother the heck out of me, and I know it's just the generation gap rearing its proverbial head again. It happens so often now, but of course always in a friendly way between younger daughter and older father, that it's more like a generation gasp these days, than a generation gap!"