A fork of Rural Dictionary
Originally an ad hominem attack against Jane Curtin by Dan Akroyd on Saturday Night Live during Weekend Update. At that time, it featured a "Point/Counterpoint" in which Jane made one point, and Dan would prefix his counterpoint with this phrase.
More recently, it has become sort of a ha ha only serious opener to such a counterpoint on Usenet, typically used amidst flamewars.
Jane, you ignorant slut! You know this needs no example!
An old Saturday Night Live parody of ad hominem attacks made by pundits.
"Jane, you ignorant slut!" is best rebutted with "Dan, you pompous ass!"