I'm talking about all the crap like MLP and the obsession with cats.
For me:
Nice guys finish last and all crap related. All the stupid meme pictures like "Reasons why I don't have a GF" the major being "Because I'm nice"
MLP; self explanatory.
The masses suddenly addressing themselves as introlovents.
The majority of memes.
A new fancy word being used somewhere major and suddenly everyone uses that word anywhere they can.
And much, much more that I can't think of right now.