someone or something whose good qualities are hidden.

This film is one of those diamonds in the rough, a wonderful gem that almost no one has noticed.

Etymology: based on the idea that you cannot see the beauty of a diamond (= jewel) when it is rough (= not yet cut and filled with brightness)

• someone after your own heart
• someone can't be bothered to
• someone can't be bothered to do something
• someone can't hold a candle to
• someone can't hold a candle to someone else
• someone can't hold a candle to something else
• someone could do something with eyes closed
• someone could do something with eyes shut
• someone could do something with their eyes closed
• someone could do something with their eyes shut
• someone couldn't care less
• someone could with eyes closed
• someone could with eyes shut
• someone could with their eyes closed
• someone could with their eyes shut
• someone, eat your heart out!
• someone from hell
• someone gets religion
• someone has got game
• someone has more bark than bite
• someone is at disposal
• someone is at your disposal
• someone is in business
• someone of a certain age
• someone par excellence