something big (1971)
One of Dean Martin's last film in the starring role is a light hearted western, which was all rage then at the movies. The film wasn't a hit and Dean only starred in a couple more films. I don't listen to film critics who hated and still do ( ie DVD critics) but what do they know. If you're a Dino fan you'll like it and want it in your DVD library.
And it has a great cast, Brian Keith, Ben Johnson, Honor Blackman, Harry Carey Jr., Albert Salmi and many more.