Short circuit

Origin

The phrase 'short circuit' emerged from the burgeoning field of electrical engineering in the late 19th and early 20th centuries. As electricity became harnessed for practical applications, engineers and technicians observed what happened when an electrical current bypassed its intended, resistive path and instead took a direct, low-resistance route—often with sparks, smoke, or fire. This perilous phenomenon was quite literally a 'short' way around the 'circuit,' threatening equipment and safety. The descriptive term quickly became standard technical jargon, and its vivid imagery of an unexpected, often destructive bypass soon escaped the laboratory, adapting into common speech to describe anything from a sudden mental breakdown to a flawed, overly direct solution.