The original photo involved a husband and wife; after one hippopotamus gave birth, her partner was separated from her, but he kept popping up and looking over the wall to check on her (awww). But now, this nosy neighbor image has become a meme with a Tumblr, explained by this simple description: "That one person in the cubicle next door."

A sampling:


Hippo Coworker [Tumblr] (h/t TAN)