Someone who rims butt holes (licks them) and is is always menatlly challenged (retarded). Thus Rimtard is a collectuve of the two.
Jules is such a rimtard I bet he blows of starfish!
by Butt monkey September 09, 2004
1 more definition
People who work for Research In Motion (RIM).
Are those RIMtards going to come out with a new phone anytime soon?
by Harvey-Lipshitz December 21, 2011