In medieval times a queen was expected to travel with a large entourage and make a grand entrance that would 'wow' all guests. Therefore the queen was alloted an extra hour to prepare for all public events without being considered late. This "grace period" became known as the queens hour and was often spent discussing the queen and predicting her entrance attire. Now used in some circles to indicate when one won't be on time, but it will be worth it for the fabulous-ness of dress or personality of the late comer.
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).