Today's phrase is, " one in a thousand " or " one in a million ".
These phrases means something or someone is uncommon, unusual, special or excellent.
Example 1
My grandma was one in a thousand ! She did so much for our family.
Example 2
A. You really are one in a million ! I can't thank you enough.
B. It was my pleasure.If you ever need help again, please let me know.