A poop knife is a knife that is used to chop up large pieces of feces so that they can be flushed down the toilet more easily. It is typically a butter knife with a heavy, silicone cover. The term "poop knife" gained notoriety after a Reddit post in which a person described their familys use of a rusty kitchen knife to chop up their feces. The post went viral, and the term "poop knife" became a popular meme. While some people use a poop knife as a gag gift, others use it for its intended purpose. The poop knife is dishwasher safe and can be used to chop up even the most prodigious of poos.