After the war ended, they were finally allowed to publish the existence of the 94th element, and Seaborg, its discoverer, was given the honor of naming it. Chemists at the time occasionally named elements after planets, the most recent being neptunium, so nobody blinked when Seaborg went ahead and called his element plutonium. But he did it primarily so that plutonium's abbreviation on the Periodic Table would be "Pu" -- it should've logically been "Pl," but Seaborg was oddly insistent about the abbreviation, because plutonium smells like butt, and also because Seaborg was a giant man-child and we love him for it.
He also discovered piss-tassium and barfanese.
Seaborg assumed that the committee would swiftly reject the proposal, and chide him for his immaturity, but the prank slipped right through, and was accepted as the official chemical symbol. And that's how Seaborg was granted a Nobel Prize for the world's most epic fart joke.