[noun] [C] - a ball of snow pressed together in the hands, esp. for throwingSomeone threw a snowball at me from behind.A bunch of kids were having a snowball fight.(esp. [US and ANZ] informal) If something does not have a snowball's chance in hell of succeeding, there is no chance of it succeeding.If he can't afford a good lawyer, he doesn't have a snowball's chance in hell of winning the case.
SNOWBALL
Meaning of SNOWBALL in English
Cambridge English vocab. Кембриджский английский словарь. 2012