The shaving cream atom, supplies of which become dangerously low on Earth in the 24th & 1/2 century, necessitating a mission by Duck Dodgers to claim Illudium Phosdex-rich Planet X in the name of Earth.

Not to be confused with its unstable isotope Illudium Pew-36
"Try new Pheno-Barbasol with the healing power of Illudium Phosdex"
by Obbens October 26, 2006
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