When a dog pees or marks a tree or any other object and a second dog comes along and pees in the exact same spot.
I was taking Scruffy for a walk and he peed on the rock. Immediately his furry friend Bailey went over and peerased it with his own urine.
When peeing you clean the inside of the toilet bowl by "erasing" the poop.
After Tom took a crap, Jeff came in and peerased the poo off the sides of the toilet bowl.