daub

verb

• carelessly coat or smear (a surface) with a thick or sticky substance:the walls were daubed with splashes of paint
• spread (a thick or sticky substance) on a surface in a careless or clumsy way:a canvas with paint daubed on it
• paint (words or drawings) on a surface in a careless or clumsy way:they daubed graffiti on the walls

noun

• 1a patch or smear of a thick or sticky substance:a daub of paint
• a painting executed without much skill: she stuck the painting up alongside the daubs made by her children

• 2 [mass noun] plaster, clay, or another substance used for coating a surface, especially when mixed with straw and applied to laths or wattles to form a wall: wattle and daub