PRAIRIE DOGGING - When someone yells or drops something loudly in a cube farm, and people's heads pop up over the walls to see that's going on. (This also applies to applause from a promotion because there may be cake.)
Whenever I see this happen in future I will always know what to call it. 
Visions of little merekats at work within the cubicles.
STRESS PUPPY - A person who seems to thrive on being stressed out and whiny.
For those of you who watched, this has to be the perfect description of Nat In "I'm a Celebrity"
PERCUSSIVE MAINTENANCE - The fine art of whacking the crap out of an electronic device to get it to work again.
I know someone who does this accompanied by lyrics along the lines of "work you B!"
OHNOSECOND - That minuscule fraction of time in which you realise that you've just made a BIG mistake (e.g. you've hit 'reply all').
I remember the classic one - seeing the car keys in the boot in that fraction of a second after slamming down the lid and just before it hits and locks.