I'm looking at John's links, and the American Dialect Society has a wonderful run-down of the year's (this year's? last year's?) newest and most interesting phrases, including Weapons of Mass Destruction (WMD), google (verb), and regime change.
But then they deliver this with a totally "straight face":
"sausage fest, slang term for a party with more males than females"
I was ROFLMAO for five minutes.
Next year, I'm going to submit jumping on the grenade.
Def: to willingly sacrifice for one's friend (usually male); ex. to spend time with the ugly friend of companion's romantic interest, esp. in a bar setting