BILLY BOB THORNTON reunites with his 'Astronaut Farmer' filmmakers MARK and MICHAEL POLISH for a new comedy with a sure-to-be-buzzed-about title, 'Manure,' and ET's THEA ANDREWS is on the set to get to the bottom of that memorable moniker!

"There are a lot of words to use here, there are a lot of jokes to be had, but we won't go there," says Billy Bob with a grin. "When you think about it, when you're selling anything, like if you're on the news, or you're like an actor going down the red carpet, you're always kinda selling manure in a way, you know what I mean?"

A comedy about the manure industry in the 1960s, the playful plot finds Billy Bob as a slick salesman enlisted to help save his company when the owner dies in a tragic fan accident and his cosmetics salesgirl daughter (TEA LEONI) is forced to take over the biz. An all-out war ensues when clean-cut KYLE MacLACHLAN and his team of salesmen try to corner the market with their fancy "fertilizer" and marketing techniques.

"The salesman world is pretty interesting," says Billy Bob. "Whether it's like bible salesmen or vacuum cleaner salesmen, whatever it is, it's a really interesting life. So [The Polish Brothers] decided to take all the humor and all the weirdness that goes along with being a salesman, and what's the ultimate one? Well, you know what it is."

Billy Bob demonstrates that he's also learned quite a bit about this seldom-discussed industry, offering, "There are different grades of manure; some are better than others. For instance, a bat has a very high-grade manure."

And many years ago in real life, the Oscar winner says he attempted to pursue door-to-door sales, but it didn't quite pan out: "I actually tried to get a job as a vacuum cleaner salesman when I was about 19 or 20, and it didn't work out for me. At the time I had hair down to my waist, and you know, I was, like, this skinny rock and roller."

Watch ET for more with Billy Bob and the cast of 'Manure'!