The most expensive precious metal in existence. More expensive than silver or even gold. John Lennon was given a rhodium record for selling so many albums.
"I be ridin' the rhodium spinnaz."
When something's both adorable and retarded. Sort of the converse of derpy.
For example, the character Ayu from the 2006 anime Kanon is Adoratard.
That cute girl that still thought Santa Claus was real in high school was adoratard.