Learning English~Persian: Idiom: Be one in a million/Chance your arm #135
## Be one in a million = Be unique.
What’s your new coworker like?
Oh, he’s unique. He’s good-tempered, very helpful, and he has a good sense of humor. He’s one in a million.
You're one in a million!
## Chance your arm
She knew there was little chance of getting through the audition test but she decided to chance her arm.