What Does This Mean: The Lights Are On But Nobodys Home? lol

[Greg.!]

^^^^^^^^^^^^^^^

[Shaun]

Basically if you say that about someone, you're saying they're very stupid.

[Lauren]

Or have a mental disability.

[TheMac]

Basically, they are awake, but they are acting like they are asleep or stupid. If someone doesn't respond to what you say for example, you might say "the lights are on but nobodys home"