To splash or spatter with small drops or particles of a liquid or other substance. The car drove through the puddle and bespattered the pedestrians with muddy water.
To soil or stain with splashes of liquid or other substances. The artist accidentally bespattered the canvas with paint while working on his masterpiece.
To tarnish or sully someone's reputation by spreading damaging or scandalous information. The politician's opponents tried to bespatter his reputation with false accusations.