Response to an unfathomable action statement made by another person. The respondent simply and sternly explains this will not take place. Ex: son is not allowed somewhere, but tells his parents, "I'm going anyways!" The parents may respond with, "like hell you are!" Respondent may feel the person had a lot of 'nerve' to say such a thing.
Lover tells their partner during an anniversary they are going to a club instead of spending it with them. Their partner would respond "like hell you are!" Meaning you aren't going, period.
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).