When driving on a road with two or more lanes going in one direction, and vehicles occupy all lanes. Said vehicles drive at the same speed and evenly, barring other vehicles from passing. This event native to Denver, where many "undocumented workers" usually from Mexico attempt to drive without a valid driver's license or automotive insurance. These illegal immigrants therefore drive significantly under the speed limit, effectively infuriating all other drivers on the road.
Sorry I'm late for work today Mr. Jenkins. There was a Mexican road block on Interstate 25.
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).