Dave was really Jacking on today. Not only did he complete all of his work ahead of scheduled, he also helped his coworkers finish their work and he cleaned up the lunchroom.
When you ride around a Wal-Mart on a Segway device with an overly sized t-shirt that has a hole cut out around your butt with your pants pulled down so everyone can see a circle of your butt cheeks.
Bro, last night I was jacking on and the police were called on me!
fat girl: i am always the third wheel
skinny girl: girl, you the third and fourth wheel
fat girl: i am sick of the fat jokes
skinny girl: i am just jocking on your bitch ass fellow homosapien of the world
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).