Sprayer

Noun

1. An object or device used to spray a liquid. Synonym of spray bottle. A device, machine or vehicle used for large-area spraying, as for irrigation, weed killers, fertilizers, insecticides, or in manufacturing and production line processes.
2. Synonym of spray bottle.
3. A device, machine or vehicle used for large-area spraying, as for irrigation, weed killers, fertilizers, insecticides, or in manufacturing and production line processes.
4. One who sprays.

   "Graffiti often includes the sprayer’s name."