What does أيادي بيضاء mean?
For example:
رجل له ايادي بيضاء على الكثيرين

How common is this expression?

Question

What does أيادي بيضاء mean?
For example:
 رجل  له ايادي بيضاء على الكثيرين

How common is this expression?

Answer

As Aisha mentioned, to have many good deeds and favors towards pthers. very common in formal speech but not everyone can understand its meaning.

Answer

I think it means  " A man who's doing favors for many.." or a metaphor for a man who's shown generosity.

Answer

literally it means: "a man who has white hands on others" which could be interpreted as "he's been generous to many people" I hope that helps :)