What is Idiot Light?
1.
When you have a stick shift car and the little light on the dash comes on. Idiot light
Jay is driving down the road and the idiot light comes on, Shift idiot!
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2.
On a moving vehicle, an unused turn signal.
That guy's been driving with his idiot light on for 6 blocks.
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3.
The green coloured indicator on a motorcycle. Which informs the rider, they are in the "Neutral" gear, when lit.
"Dude...Why's my bike not moving?"
"Of COURSE it's not moving, STUPID! Your 'idiot light' is on!"
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