«مِينْ يِقْدَرْ يُقُولْ: يَا غُولَهْ عِينِكْ حَمْرَهْ؟»

Framed as a question whose expected answer is 'no one,' the saying imagines a person speaking directly to a ghoul, the predatory, fearsome monster of Arabic folklore, and remarking on its red eye. Taken at face value, it holds that such words are simply not said to a creature of that kind.

How far the image stretches beyond that is open. One plausible reading is that people keep quiet before someone frightening. However, the significance of the red eye is uncertain: it may be a blemish the ghoul would resent hearing about, or simply an obvious sign of its menace, and both readings remain possible.

Use it as a rhetorical question suggesting that nobody would say such a thing to a fearsome figure. Applying it to silence before power or authority, such as a powerful person whose faults go unmentioned, is an interpretation of the image, not a fixed sense.