Once upon a millennium, the Courier had to go to Hogwarts to give Dungledum a piece of her mind and/or tiddy, because in this dimension he a pan wizard. He's not really a wizard though, he just huffs deathclaw piss which gives him delusions.
One fateful day, Dungledum had a vision. He imagined a dimension in which New Vegas was instead called Future Fruities, and this world was populated entirely by Vault Folk.
Vault Boy is now a grown ass man, and is tired of being called boy. He has grown kids who are so bara they can break deathclaws in half with their pinky fingers.
But the deathclaws are not deathclaws in this world. They are instead foothooves, they are shaped like giant human feet with horse limbs. They stampede people into an irradiated mess, and the traveling merchants hate them because they always get the best discounts.
The Courier, on her mission to Hogwarts, got tired of getting ripped off by the foothoof merchant named Dlongr, so she dug a ditch, filled it with radroach poop, then buried Dlongr in it.
This crime against the foothooves offended the foothoof matriarch, who looked more like a cross between a foot and a termite queen, with countless horse legs to slowly scoot her around.
Googertinen opened the dimensional portal, summoning the deathclaws to this world. They tried to mob the Courier, but they all fell into the radroach shit hole because they were dumb like that.
Laughing maniacally, the Courier picked up all the irradiated bug turds in her rippling arms of level 10 Strength, then harried Googertinen with the turds like machine gun fire, burying her completely and killing her with radiation.
Googertinen's stomach exploded, freeing the half-baked foothooves within. They tried to mob the Courier, but she roundhouse kicked them all into Scorpion Gulch, where the giant radscorpions, who were in rutting season and itching to smash, made sweet love to them all through the desert night.
Meanwhile, the ghost of Chet, after he was tragically skullfucked to death by giant mantises who were also in their horny season, was tired of the Mojave Wasteland so he sought to rename it Bulletbutt.
The Courier got an insatiable urge to vote to rename the Wasteland to Bulletbutt. She entered the portal formerly guarded by the foothoof queen, then met up with Dungledum.
Dungledum had the power in him to grant one wish, with no restrictions or inevitable backlash.
The Courier, originally sent here to wish the undoing of the nuclear war which harried the Earth, hesitated.
"I wish...I wish the Mojave Wasteland was called Bulletbutt instead."
Dungledum nodded. "Your wish will be granted."
He snapped his fingers, then returned the Courier to Bulletbutt.