Akaku š is a word that is said after prayers when praying to Kurapika Kurta. However you can say it whenever as long as it's for Kurapika Kurta in a respectful way. It originated from Kurapika Kurta's character song called "Hi Ni Moeru Hitomi." Akaku š is a very important and sacred word for Kurtism/Kurtaism (the Kurapika religion).
When you have to pee in a movie but donāt 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).