The definition comes from when you go to your car and the driver unlocks the doors but you pull the handle to soon. What happens from this is your door remains locked but every other door in the car is unlocked. People refer to this as screwing the pooch.
Narrator: Person one and person two are outside of their car as person one unlocks the car doors. Person two accidentily opens the car door too soon making his door stay locked.
Person one: Dude, why you be screwing the pooch!
person two: ya well...ur mom!!!
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).