To express approval or enthusiasm for something
Q: Dewd, did you see that footage of the new Vivid pr0n
star Billy had up on his PC during social studies class?
A: I was yayin' it br0
Billy, I'm yaying the pr0n you shared with us during class...
Workers that fill minor support roles on the job ("assistants"), yet somehow tend to be the focus of the frustrations and negative emotions that are ever-present in the workplace.
Owner to Manager: "Company profits fell last quarter."
Manager to Salesperson: "Company profits fell last quarter because of the subpar performance of our sales team."
Owner, Manager, and Salesperson to assistant: "You lazy unproductive dipshit!
Assistant muttering to self: "Smoked a little weed in high school and wound up in this pee-on platoon"