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!
ayon kay Butt monkey ika-09 ng Setyembre, 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?
ayon kay Harvey-Lipshitz ika-21 ng Disyembre, 2011