Source : Webster's Revised Unabridged Dictionary (1913)

Ball \Ball\, v. i. [imp. & p. p. {Balled} (?); p. pr. & vb. n.
   {Balling}.]
   To gather balls which cling to the feet, as of damp snow or
   clay; to gather into balls; as, the horse balls; the snow
   balls.