A Oklahoma tuxedo is also known as bib overalls or bibbers. Most commonly round house brand striped overalls. But they can be just about any brand and any type of denim. Pairing this with a felt stetson or resistall hat makes for a casual but yet oddly formal outfit.
Bob: Hey Jimmy break out the Oklahoma tuxedos. Sally's getting married to Willy.
Jimmy: I'm on it. Do you want your black or tan hat.
Bob: Bring the black one. It's a 8x.