The lights are on but nobody’s home
Meanings of "The lights are on but ..."
It is used to describe a stupid person ,refers to a person who is not very bright, a daydreamer, a person whose mind is elsewhere an otherwise intelligent person who is not using their brain, someone who is not at all alert, something that you say when you think someone is stupid, when someone does not react because they are thinking about something else, have a brain, but not using it.
It is said in a way to tell someone that they lack awareness or intelligence.
“No matter how hard I try to understand what Jim is talking about, it is apparent that his lights are on but nobody is home.”
Originated in America, people have been using this idiom since at least the 1970s. The phrase first appeared in print in 1974, in Jason A. Colquitt’s book Organizational Behavior.
"The lights are on ..." in lyrics
Drunk and unhappy I’m weaving myself my way through the crowd
Dragging around everything that's been keeping me down
St. Erik, he lives in the walls and he's following me around
When the world has gone mad and there's nowhere to roam
The lights are all on but nobody's home
There comes a time when you look up to the sky
And ask "why do my favourite songs always make me cry?"