“My bad.” A wretched phase when first used, and it hasn’t gotten better with time.
Meh.
Og.
Hi Opal.
How can you be tired of meh? It’s such a useful expression, and no other word performs quite the same function.
I have to cop to a few of these, although I’ve never been quite douchey enough to use fail as a noun.
All douche based references
Even douchebargé? 
I saw it, I chuckled, I decided not to notice it publicly. See, this way you get to catch the flak if there is any. 
“Band name!”
Even Dave Barry himself said that this was no longer funny.
[ul]
[li]Don’t go there.[/li][li]I’m all about X[/li][li]Extreme: Let’s just get rid of the word entirely. It’s now too tainted by Gen-X’ers to ever be useful again.[/li][li]Gen-X’ers[/li][li]And from the reality show world: Throw under the bus.[/li][/ul]
“Stabby” as in “such and such makes me feel stabby.”
“The boy” or “the girl” for one’s significant other. Stop acting like your entire universe doesn’t revolve around the person.
I’d be happy if we could just get rid of the XTREME variant.
I’m a fan of “1980s called. It wants its joke format back.” It’s reflexive humor!
“Band name!” is a foil phrase: it’s not supposed to shine in and of itself, it’s supposed to make whatever you place beside it shine bettter.
I’d love it too. At this very moment, I’m using an application called “EXTRA! X-treme” Bet you’ll never guess what it does with a name like that…
It’s an IBM 3270 mainframe terminal emulator. About the most boring and un-extreme thing I could ever think of.
I believe we have Rachael Ray to blame. She’s big on sammiches, sammies and everything is yummo! to her.
Has anyone ever documented a case of her saying “E.V.O.O.” and not then immediately afterward clarifying by saying “extra virgin olive oil”? I’m really starting to wonder if she fundamentally doesn’t understand what abbreviations are for.
“…aaannddd ‘Scene.’”
Blah blah blah… this many dollars.
Blah blah blah… a different number of dollars.
TV commercial gimmick outliving its novelty by nearly a decade… priceless.
“Low-hanging fruit.” I was taking part in a teleconference a few weeks ago, and somebody used this cliché four times. I wanted to hang him from a high-hanging limb.
Sustainable
A gentleman in the hallway bumped into me the other day, and offered a genuine, ‘‘My bad.’’ At which point I realized that was his way of saying ‘‘excuse me.’’
I was not personally offended, but I found that fascinating. He was roughly my age (mid twenties.)
(I of course responded with ‘‘no problem.’’ I can hear the Dopers gnashing their teeth now.)
unintended consequences