A "monkeys paw" is when you're taking a shower and you're out of wash cloths Once you get to washing your ass, you soap up your hand and get down there to clean it all out with that soapy bare hand. You're then left with a clean ass but in return, no matter how much you clean that hand, it feels dirty for the rest of the day.
I cant eat tacos today, I gave myself a Monkey's paw this morning and I forgot which hand it was.
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).