the lights are on, but nobody is (at) home
01
used to refer to someone who is not paying attention or is not intelligent enough
Idiom
Informal
例
During the meeting, he just sat there with a blank expression, as if the lights were on, but nobody was home. It was clear he was n't paying attention.
I tried discussing the issue with him, but it felt like the lights were on, but nobody was home. He was n't really listening or responding.
