If The Gobbler is Illinois' biggest sloper, Meth Mouth HAS to be Wisconsin's. You start on the far left end of the feature on a blocky start hold. Traverse the incredible feature, enjoying perfect slopers, move up and left to a perfect ledge and make the crux move (reminiscent of the move to the sloper on Slope of Dadaism, though slightly easier) to the lip. Celebrate having climbed the coolest thing at DL.
South end of the cliffband/boulder grouping that makes up the "West of Surprise Boulder" area.
You probably want at least 2 pads and a spot. It's not tall, but the landing is a tad hairy.