Going postal at school, hopefully going postal on vacation, going postal on my roommates, not literally of course.
What an adjective! Postal. One word that was created because of psycho employees of the USPS! Government employees of all people. What would your adjective be called? Mine would be called going teacher... or more likely going teacher on your ass. I've had to go teacher on my roommates this week. They paid the wrong bill and we got our gas shut off. Idiots! I don't know how I expected them to manage my house, pay bills, keep things clean...
Here are some off the top of my head:
going fry cook
going car salesman
going sales clerk
car salesman and sales clerk sound annoying
fry cook sounds going dumbass
going garbageman sounds like going home, watching TV, drinking beer and not taking a shower... why bother?
disclaimer: yes, these are all stereotypes.