Somewhere in the lost ’80s, “Saturday Night” Live did a faux commercial with Gilda Radner brightly touting “Shimmer! It’s a floor polish and a dessert topping!”

Williams & Ree, playing Harrah’s South Shore Room at 9 p.m. July 30, are country-meets-rock-greets-parody, shaking hands with political satire of which Radner would surely enjoy. Their jaw-cramping hilarity set to song stretches established categories while entertaining fans with more than 200 dates each year.

College buddies Bruce Williams and Terry Ree have touring the country for three decades with their tear-inducing blend of laughs and riffs. Political correctness is not part of the script: Ree draws often from his Sioux roots, to the extent that the duo has the nickname “The Indian and the White Guy.” The routine also is known as “The Smut Show,” and yes, the boys venture off the straight and narrow quite often.

“It’s mostly ad-lib,” Bruce Williams told Lake Tahoe Action from his Nashville home. “It’s sort of hit-or-miss, and then we go back to some things that are tried and true. Things change every time we’re on stage. Of course, now we’re getting so old we can’t remember later what we said.”

The team has produced seven CDs and five DVDs to date, with such tongue-in-cheek titles as “Taking Reservations,” “Indian and a Jones” and “Totem Recall.” And their naughty little “Ding Dong Song” is a YouTube favorite.

As to the trick of making a work collaboration last so long, Williams quipped, “It’s a lot of give-and-take. It’s like a bad marriage ” purely financial! But really, the trick is longevity. By lasting so long, eventually everyone finally gives us a shot. We play off each other, and we’re very different ” Terry is country, I’m rock ‘n’ roll. It’s like I’m Donny and he’s Marie.”

Williams & Ree met in 1968 at Black Hills State College in Spearfish, S.D., starting off in a college band. Spearfish? Perfect ” even their own history is a great comedy setup, which they realize and use to their advantage.

“The Indian and the White Guy routine was a natural for us right from the start,” Ree said. “People never questioned our material or gave us any flak. I mean, I am an Indian and, in fact, we do our act at a lot of Indian conventions and before Indian groups. The truth of the matter is that we pick on everyone, no matter what their background.”

The entertainers blend biting political commentary and current headlines, with original songs and sass. Over the years, they’ve toured with big names like Garth Brooks, Randy Travis, the Oak Ridge Boys, Tim McGraw and Charlie Daniels.

They’ve appeared on the Nashville Network and TNN, along with guest spots on “Hee Haw,” and spent more than a few nights on the stage of L.A.’s prestigious Comedy Store. Known a bit more for their humor, there’s some strong musical talent here, proven when the duo was nominated for Best Vocal Duo by the Country Music Association in 1995.

Terry Ree says, “We do songs, we do comedy. Actually, I don’t like to label it comedy. I think we entertain people.”

Comedians? Musicians? Rosanne Roseannadanna and thousands of Williams & Ree fans are proof that they can be both, as long as you’re laughing.