When you have a bowel movement that replicates the shape of a shark. ie. pinching it off to make a pointyend like a shark face swimming in your toilet bowl.
Dude, after eating that burrito, I have to go carve a shark!!
Defecating, dropping a big turd, dropping the kids off at the pool. So named for the tail left above the water, after you've sculpted your brown water-dwelling silent killer.
"Those street tacos are tearing me up, I'm gonnagocarve a shark."
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).