nobody home slang 1. Your attention is somewhere else, not on what is being said or done here; you are absent-minded.
The teacher asked him a question three times but he still looked out the window. She gave up, saying, "Nobody home." 2. You are feeble-minded or insane.
He pointed to the woman, tapped his head, and said, "Nobody home." [TahlilGaran] English Idioms Dictionary ▲