A Snowballs Chance In Hell Edit Meaning

1.

The chance a snowball has before it is obliterated by the fire and brimstone of hell, kind of like the chance frosty the snowman has against a military grade flamethrower or popsicle against the heat of the sun

"theres a snowballs chance in hell of that guy jumping that and not breaking every bone in his body"

See snowball, unlikely, hell, chance