Top Definition
Chemical symbol: Un.
Atomic number 327.
An odoriferous brown substance that usually exists between the toliet seat hinges and the bowl.
Uronium may also appear around the bolts that hold the toliet to the floor.
Some people choose to ignore uronium; choosing instead to mask its unique odor with Glade® Plug-Ins® or Wizard™ aerosol.
by Telephony October 24, 2010
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