«جَا يْطُل غَلَبِ الْكُل»

The expression portrays someone who never took part in what the others were busy with. He merely put in an appearance, yet that alone was enough for him to get the better of every one of them.

The striking detail is how little the newcomer does: he only looks in on people already occupied with an activity. His easy superiority is contrasted with their fuller involvement, not presented as the reward for joining their work.

Use it when someone who has scarcely participated nevertheless outdoes a group of peers—for example, a visitor who immediately sees a solution others have struggled to find. Depending on the situation, it may convey surprise, admiration, or irritation.