«ضَاعْ عَقْلُهْ فِي طُولُهْ»

This traditional jab mocks a tall person by suggesting that their good sense was stretched so thin across a long frame that it went missing somewhere inside. It rests on an old stereotype linking bodily height with dim-wittedness. It records that teasing and is not a real claim about tall people or about intelligence.

More broadly, it points to the gap between an impressive appearance and a disappointing performance. Someone who looks commanding but behaves foolishly is shown to have plenty of stature and very little substance, and the remark is meant to deflate them with humor.

Used informally to tease or belittle a tall person who has acted foolishly or missed something obvious. It works as a jab among people who know each other. Said to a stranger, or with real hostility, it lands as a plain insult about both looks and intelligence.