Phrase used to describe someone of extremely low intelligence. A Bushtard is far more dense than a retard and has an IQ closer to that of George W. Bush.
Don't be such a fucking Bushtard! Next thing you'll be running for president!!
A portmanteau of the words bastard, retard and the name of the current President of the United States of America, George W. Bush. Used to refer to supporters of his policy, ignorant statements supporting them, as well as the man himself.
If you think that less money spent on education is a good thing, then you're a Bushtard.