all hat and no cattle
Full of talk that is more impressive than that which one actually possesses or is able to do. Primarily heard in US, South Africa. He talks as though he knows more than anyone else, but he's all hat and no cattle.
cattle call
A large audition (for film, television, theater, etc.) that is open to the public, meaning many people typically attend and they are often seen very briefly. I spent days preparing for the audition, but it turns out it was just a cattle call and they ushered me out before I was even halfway done with the monologue.
cattle market
1. A typically public place where one goes to find potential sexual partners. Almost always used in a negative way. Primarily heard in UK, Australia. Our college's student bar is such a cattle market on the weekends. It seems like everyone I know has hooked up with at least one person there. Everyone knows that the clubs on Leeson Street are just cattle markets for single people.
2. A place or situation in which people are gathered, displayed, and appraised for their looks or abilities, akin to cattle being valued in a market. Primarily heard in UK, Australia. These summer training camps are really just cattle markets for college football recruiters to find the most promising up-and-coming players. The restaurant is an oddity, a cattle market that only hires women for their large busts.