(idiom) no chance at all
A: Do you think I could be a model? I’ve been going to the gym a lot lately.
B: Well, you’re overweight, you have terrible hair, and you are ugly. There is not a snowball’s chance in hell that you could become a model, Mike.
A: Oh. Thanks dad.
There is not a snowball’s chance in hell that it will snow in southern California in the middle of the summertime.
From the News: