When you fuck someone from behind while simultaneously eating pizza off of their back. Typically pizzabacking involves pizza in a box, but fresh-hot pizza can be applied directly to a recipiant's back if they need to be taught a lesson. To simulate an acid trip, try pizzabacking while watching Hanna Barbera cartoons. If you don't have a sex partner or pizza available and you still want to simulate an acid trip, try watching Hanna Barbera cartoons.
Middle Manager with Nothing to Lose: Linda do you know the difference between a Caesar Salad and a Pizzaback?
Confused Secretary: No?
MMWNTL: Good, lets do lunch. And by lunch I mean you from behind while I eatpizza off of your back.
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).