"Poopy Jerry" appears to be a misinterpretation or combined reference to two distinct, popular concepts from the show Rick and Morty: 

• Mr. Poopybutthole: A recurring, beloved, and often tragic character in Rick and Morty who frequently breaks the fourth wall to speak to the audience in post-credit scenes.
• Jerry Smith: The insecure, often incompetent father in the same show, who is frequently the subject of ridicule and bad luck. 

Key Contextual Points:

• "Mr. Poopy Butthole" is not a parasite, despite initial fan theories, but a genuine friend of the family.
• The phrase "poopy" itself is slang for something of low quality, bad, or, in this character's case, a name often interpreted as a synonym for "shit-covered".
• The two characters (Mr. Poopybutthole and Jerry) have interacted, such as in the episode "How Poopy Got His Poop Back," where Mr. Poopybutthole stays with the Smith family and experiences hardships, similar to the misery often inflicted on Jerry. 

If "poopy jerry" is being used in a broader, non-Rick and Morty context, it likely refers to a "jerry" (a slang term for a foolish or incompetent person, especially in skiing or general usage) who is acting in a "poopy" (terrible, inferior, or embarrassing) manner.