Gawker recently compiled a list of words (mainly expressions and phrases, actually) that the post's author feels should fall out of use. The list included both tired, hackneyed sayings that were either never cool to begin with ("cool beans" for example), and what were once fresh memes but are now stale (i.e. "fail"). I'm surprised that Gawker neglected to mention the "worst. ___. ever." construction, since that one is both overused and annoying. We have ComicBookGuy to thank for that.

I must say I'm guilty of using these. One example would be the lolcatz meme, which usually entails saying, "I can haz ___." I also use the words "creepy" and "douchebag" way too often, though the former does not really constitute a linguistic trend, whereas the latter has been very popular in the last decade.