"Slut" is bad. But the worst thing Limbaugh did was allow his name to be mentioned in the same breath as these scumbags. eg;

~During the 2008 election Ed Schultz called Laura Ingraham a “right-wing slut.” No lost sponsors.

~Keith Olbermann said that conservative commentator S.E. Cupp should have been aborted by her parents, said Michelle Malkin is a “mashed-up bag of meat with lipstick.” Hillary Clinton? Olberman said he thought she should drop out of the presidential race, “let's find somebody who can take her into a room and only he comes out.” No lost sponsors.

Bill Maher, on whose show many democrat pundits and politicians appear has given $1 million to President Obama’s super PAC.  Maher has called Palin a “dumb twat” and dropped the C-word in describing Palin. He called Palin and Congresswoman Bachmann “boobs” and “two bimbos.” He recently said Rick Santorum’s wife uses a vibrator. Nothing From HBO.

Will Obama demand that the Super PAC return Bill Maher's $1,000,000? Ha, yeah right.