1snow·ball 
/ˈsnoʊˌbɑ:l/ noun
plural snow·balls /ˈsnoʊˌbɑ:l/ noun [count] : a ball of snow that someone makes usually for throwing
▪ This snow is perfect for making snowballs. ▪ During recess, the children had a snowball fight. [=a playful fight in which people throw snowballs at each other]
▪ This snow is perfect for making snowballs. ▪ During recess, the children had a snowball fight. [=a playful fight in which people throw snowballs at each other]
a snowball's chance in hell
informal : any chance at all — used to say that something is extremely unlikely or impossible ▪ Let's be honest—there isn't a snowball's chance in hell that we'll win this game. [=there's no chance that we'll win] ▪ Unfortunately, he doesn't have a snowball's chance in hell of getting the job. [=there is no chance that he will get the job; he will not get the job]
