Joan Osbourne is an American country singer.
In this context 'slob' means...just an ordinary person.
While the Senate and all the others are investigating President Nixon, somebody should start thinking about trying to help out the Poor Slob in America......New York Times
Of course people don’t want war. Why should a poor slob on a farm want to risk his life in a war when the best thing he can get out of it is to come back to his farm in one piece?”