·noun The Guelder-rose.
II. Snowball ·vi To throw snowballs.
III. Snowball ·vt To pelt with snowballs; to throw snowballs at.
IV. Snowball ·noun A round mass of snow pressed or roller together, or anything resembling such a mass.
A jeering appellation for a negro. ...
Dictionary of The Vulgar Tongue by Francis Grose
Dictionary of American Words And Phrases by John Russell Bartlett.