splatter dash

The term "spatter dash" in architecture and construction refers to a specific finishing technique. It involves creating a textured surface by dashing a thin mixture of cement and coarse sand onto a fresh mortar base. This method is also known as roughcast.1

Another application of "spatter dash" can be seen in painting, where it refers to applying paint of a different color by spattering it onto an existing coat to create a decorative effect. The term "splatter" itself, as a verb, means to wet or soil by striking with something liquid or mushy, which relates to the application method of spatter dash.12