A loud, incendiary, overweight, entertainer normally found in talk radio, who believes in their own self importance however, is considered a joke by general population.
Etymology: The expression was first used by the New York Times to describe Rush Limbaugh in March 2009.
Did you see that Rushbo babble for 90 minutes?
He is Rushboing his credibility.
Rushbo yourself ASAP.
Clown, circus performer, low quality entertainer
Erudite, meaningful, relevant