Pissassdick Share definition Flag When a mammal urinates through its anus with such intense pressure that it blows out the anal cavity, forming a penis-like tube on the exterior of the body. I shouldn’t have started that liquid diet because it gave me a big ole’ pissassdick. Pissassdick by Paragraph Punisher May 11, 2019 Get the Pissassdick mug.