The reference comes from The Pout-Pout Fish, the 2008 children's picture book by Deborah Diesen about a gloomy fish with a permanent pout who spreads his dreary feelings to others. Online, the name became shorthand for anyone looking miserable or sulking for attention. This short voice line borrows that image and turns it into a teasing insult between friends, which is why it circulates in meme edits and reaction videos rather than as a clip from an official adaptation.