Back when I was in high school (and no, right now I don't particularly feel like admitting how long ago that was :-) ), there was a popular saying amongst my circle of friends. It was "punch my give-a-shit card," often simply abbreviated to "punch my card" or a vague hand-wave while holding your fingers in a card-grasping position (especially when teachers and/or parents were around), when something happened that you were theoretically supposed to care about but that, in reality, you just didn't.
/me waves hand vaguely
Punch my card.
If all else fails, lower your standards.