Definition of the lights are on, but nobody's (or no one's)home in English:

the lights are on, but nobody's (or no one's)home

phrase

  • Used to suggest that a person lacks intelligence or awareness.

    ‘looking into their eyes, it's a clear case of the lights are on, but nobody's home’
    • ‘The bland expression on her face just looks like "the lights are on but nobody is at home"!’
    • ‘When it comes to "support" from these folks, as with so many other things, the lights are on but nobody's home.’
    • ‘Whenever you talk to them they always have that that empty, glazed over, look in their eyes; it's like you know the lights are on but nobody is home.’
    • ‘What's up with Calvin's vacant "the lights are on but nobody's home" type stare.’
    • ‘She's as boring as could be, I'd imagine, because she has that "lights are on but there's nobody home" expression about her.’