"This is bowling. There are rules."
(Kaiba is about to jump off a castle's battlement)
Yami Yugi: Dude, don't you think you're overreacting a little? I mean, it's just a card game.
Kaiba: Card games are serious business!
Serious Business is when a story revolves around an activity where a sizable portion of the in-story population takes it
far more seriously than they should. If something's popularity rivals that of
Elvis Presley,
The Beatles, or
Michael Jackson; or if there are mainstream
schools devoted to it instead of teaching reading, writing, and arithmetic, it's
Serious Business.
It's often a
Silly Reason For War, and can turn a casual conversation into a heated
Cavemen vs. Astronauts Debate. Frequently "opposed" by the
Cavalier Competitor. Compare
"Stop Having Fun" Guys. For the saying that "
The Internet Is Serious Business", see
GIFT.
Compare
Duels Decide Everything.
Examples:
