Hellions: I Need a Word!

So my kids are in the other room watching TV, and suddenly, they're laughing and mockingly singing the themes to "Charles In Charge", then "The Facts of Life."

But here's the thing: these kids, I know, have never seen either of these lame sitcoms. Their entire knowledge comes from these shows being satirized by other shows, such as Scrubs, in which a character sang in a barbershop quartet that performed only old TV themes.

Likewise, when my son and I watched Casablanca the other night, he noted that, even though he'd never seen it before, he knew all the good lines, becuase they'd been referenced so many times. I've never seen Titanic all the way through, but I know it through stuff like this:




So, I need the collective wisdom of my Hellions here: what do you call the phenomenon where someone knows a movie, TV show or what have you, not through actually seeing it, but through seeing it referenced?