ما هو الفضول؟

In summary: "Fudul" (فضول) is the plural of "fadl" (فضل), and "fadl" means an advantage or an excess of anything, or a remainder that is not needed. The use of the word "fudul" has become predominantly associated with that which contains no good, and "fuduli" (فضولي) is now used to describe someone who meddles in what does not concern them, or one who disposes of another's rights without legitimate permission.