snowball

(snōˈbôlˌ)

1. a. A mass of soft, wet snow packed into a ball that can be thrown, as in play.
   b. Chiefly Southern U.S. A cup of crushed or shaved ice flavored with colored syrup.
2. Any of several plants having rounded clusters of white flowers, as the guelder rose and certain species of the arrowwood.

1. To grow rapidly in significance, importance, or size: problems that snowballed by the hour.
2. To throw snowballs.

1. To cause to grow or increase rapidly.
2. To throw snowballs at.