Verb: to turd-decorate a wall, facility, business, or residence, whether interior, exterior, or both, with turds, especially if done with turds fired from a true turd cannon constructed of a hollow tube of 6 or more soda cans gray-taped together, then packed full of feces & propelled forth by a gas-powered liter fluid ignition lit through a touch0holr in yhe last can.
Noun: The above-referenced device that actually hurls the turds at high speed upon ignition of the liter-fluid propellant.
"We turdcannoned shit all up on the inside of the skylights at the mall, and the sun dried it hard as cement!"
"Wait'll you see what my new 8-can turdcannon can do. It'll blow a load of turds 50 feet at high speed!"