Angry pixies
Angry pixies turns up in 2 fields: machine shop, electricians. Here is what it means to the people in each one.
Angry pixies in machine shop
Tool-teardown slang for electricity, the invisible little creatures that bite when you get careless.
A playful name for electrical current popularized in tool-teardown culture, treating it as a crowd of irritable pixies that live in wires and outlets. Containment devices keep them in, and loose wiring lets them out. The phrase covers both the power that makes a machine run and the shock that teaches respect for it.
"Unplug it before you open that grinder, the angry pixies don't care that you're in a hurry."
Angry pixies in electricians
Joking name for electricity itself, especially when it escapes as sparks, smoke or a shock.
Angry pixies is shop humor for electric current, picturing it as tiny creatures that run happily through the wires until something lets them out. Electricians blame a scorched receptacle or a popped breaker on the angry pixies and tell apprentices to keep the pixies in the wires. Like magic smoke, the joke wraps a healthy respect for what current can do.
"Loose neutral on that receptacle, the angry pixies have been cooking it for months."