a little or no chance of success

snowball’s chance = nicht die Spur einer Chance

EXAMPLE SENTENCE :

How can you tell if a technology company has a SNOWBALL’S CHANCE of going anywhere? (Fox News) --- "We are trying to make it as easy as possible for people who have thoughtful things to say to get those ideas and stories out there, and to tie it into a network where it has more than a SNOWBALL’S CHANCE in hell of getting the audience it deserves." (Twitter Co-Creator Ev Williams)