No, she won’t sue.
First, an opinion cannot be libel or slander. It is an opinion.
Second, truth is a defense to libel or slander ... so, if she convinced a court that it was a factual statement (rather than an opinion), she’d have to endure the other side trying to prove she’s a slut. I doubt she’d want that adjudicated. It wouldn’t be pretty.
No chance.
SnakeDoc
It's not an opinion when Rush says "Sandra Fluke said she was have to much sex . . . " That's a statement of fact by Rush. The 'slut' thing is the least of Limbaugh's worries. He made dozens and dozens of specific 'factual' statements about what Fluke said . . . and Fluke didn't say any of those things.
truth is a defense to libel or slander
Well, yeah. Which is why Rush would clearly be in trouble if Fluke weren't a limited public figure. Because Rush made up all of those thing he claimed that Fluke said, and presented as fact as her statements.
The suit wouldn't be about whether she was a slut, it would be about whether she claimed she was having all of this sex and wanted to be paid for it. Did she make those claims? No, she did not. She never mentioned her own sex life a single time. Or her own contraception. Rush made all of that stuff up.
And he used somewhat generic terms. I doubt somebody could successfully sue if, for instance, somebody called you or me an “idiot” in the media.