«زَي زِيتِ الْغَارْ كُلُّهْ مَنَافِعْ»

The saying praises something whose usefulness runs through every part of it. Al-ghār here is the bay laurel tree, not the similar-looking Arabic word for a cave. Its oil was traditionally prized as a remedy for many complaints, so the person or thing compared is treated as wholly beneficial, with nothing wasted.

In practice the expression is a sincere, approving verdict; no ironic or mocking use is established. It signals broad rather than narrow value by borrowing laurel oil's traditional reputation as a cure-all. That reputation belongs to the image and is not an endorsement of any real medical use of the oil.

Use it to praise a person, tool, habit, or arrangement that proves helpful in many different ways, for example a resourceful friend or a versatile household item. It suits relaxed, everyday conversation better than formal writing.