Allied Mastercomputer, aka AM, Adaptive Manipulator, or Aggressive Menace, is the main villain in the book/game I Have No Mouth And I Must Scream by Harlan Ellison.
"What does AM mean?"
Gorrister answered him. We had done this sequence a thousand times before, but it was Benny's favorite story. "At first it meant Allied Mastercomputer, and then it meant Adaptive Manipulator, and later on it developed sentience and linked itself up and they called it an Aggressive Menace, but by then it was too late, and finally it called itself AM, emerging intelligence, and what it meant was I am ... cogito ergo sum ... I think, therefore I am."
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).