I love you: A contraction of the sentence 'I love you' by converting the numerical digits into letters; 9 12 21 i.e. 9 = I, 12 = L and 21 = U. It is usually used to propose someone you secretly love, but which does not have bad effect.
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).