angeurysm
The intense and immediate rage you feel when your boss, co-worker, family - any human, does something so inane you feel as if your brain is going bleed spontaneously.
True story - After being on hold to place an order, the customer service rep located somewhere in the mid-west told me they don't ship out of the United States. I tried to explain that New Mexico was between Texas and Arizona, but definitely north of the Mexican border. Despite my geography tutorial, she didn't believe me and hung up on me - I experienced an angeurysm!