Definitions of spatter:

• noun:   the act of splashing a (liquid) substance on a surface
• noun:   the noise of something spattering or sputtering explosively

  Example: "He heard a spatter of gunfire"

• verb:   dash a liquid upon or against
• verb:   spot, splash, or soil

  Example: "The baby spattered the bib with food"

• verb:   rain gently