used to describe a person who is so sneaky that nobody can see him, a bit like a snake, but not a snake.
Person 1: Hi there!
Person 2: I just stole your pants.
Person 1: (looks down and sees his pantsgone)
Person 1: (looks up and sees Person 2 gone)
Person 1: WTF OMG THAT SNEAKY SNEKU
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).