Idiot Stick
A non-contact voltage tester — pen-shaped, beeps near live wires.
Definitions
Electrician slang for a non-contact voltage tester — the pen-sized gadget that lights up and chirps when you wave it near a live conductor. Called an idiot stick because (a) any idiot can use one and (b) trusting it blindly will make an idiot of you. Notorious for false positives on ghost voltage and the occasional terrifying false negative, which is why old sparkies always confirm with a meter.
Older general-labour usage: a shovel or pickaxe. Same logic as goon spoon — the tool you hand to someone who doesn't need training to use it.
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