To ingrain grime or dirt which is difficult to remove into (something); also (more generally), to make (something) dirty; to soil.
To apply (something) to a surface in hasty or crude strokes.
To paint (a picture, etc.) in a coarse or unskilful manner.
Excrement or clay used as a bonding material in construction.
A crude or amateurish painting.
A soft coating of mud, plaster, etc.