submissive pisser

referring to a dog, usually a small breed such as a Cocker Spaniel or a Maltese. dog in question, urinates when being touched, or being excited. the dog gets excited and that is the first muscle that loosens up.

Fluffy, while being potty trained, is a submissive pisser. If someone comes in the front door, or if you pet her, she gets overly excited and pees on the floor.