Poopmanteau
A portmanteau created by combining a pre-existing word with the word poop. It is itself both a portmanteau and a poopmanteau.
Jake: Man this computer is so slow
Fred: I know. It's more like a compooper, amirite?
Jake: That's a darn good poopmanteau.
Fred: I know. It's more like a compooper, amirite?
Jake: That's a darn good poopmanteau.