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snowball

1 snowball /ˈsnoʊˌbɑːl/ noun
plural snowballs
1 snowball
/ˈsnoʊˌbɑːl/
noun
plural snowballs
Britannica Dictionary definition of SNOWBALL
[count]
: a ball of snow that someone makes usually for throwing

a snowball's chance in hell

informal
: any chance at all used to say that something is extremely unlikely or impossible
2 snowball /ˈsnoʊˌbɑːl/ verb
snowballs; snowballed; snowballing
2 snowball
/ˈsnoʊˌbɑːl/
verb
snowballs; snowballed; snowballing
Britannica Dictionary definition of SNOWBALL
[no object]
: to increase, grow, etc., at a faster and faster rate