Snowball /(?)/

1. A round mass of snow pressed or roller together, or anything resembling such a mass.
2. The Guelder-rose. (Bot.)
3. a shrub of the genus Viburnum, having large clusters of white flowers. (Bot.)

imp. & p. p. Snowballed; p. pr. & vb. n. Snowballing

1. To pelt with snowballs; to throw snowballs at.

1. To throw snowballs.
2. To increase in magnitude at an accelerating rate, achieving large proportions; -- by analogy with a snowball rolling down a steep hill, causing a large snow slide.