That one predates vibe coding by quite a few years though: a lot of hard work went into Goat Simulator, and there were no doubt other more obvious choices for how the developers spent their time, but they still chose to make Goat Simulator.
Also it's a geninue game with goals to complete, mainly cribbing from games like the Tony Hawk's series.
Two separate categories: Meme games[*] don't have to be vibecoded, not all vibecoded things become meme games.
[*] A "meme game" being a game which is tries to be ridiculous and is predominantly popular because of social media exposure. I would include games like Goat Simulator, Horse Magnifier, Squirrel with a Gun, QWOP, Untitled Goose Game, Trollface Quest...
From what I remember it was a project for Coffee Stain (the studio) to train up/onboard new hires, having started as a modding team with Sanctum for UT3 and later a full standalone release. Then they ran with it for a while after it struck a chord with people willing to give them money.
