A: Mike said he would take us on a day tour to the seaside after he bought his new van.

B: Don’t count on him. That guy is all hat and no cattle.

Note: “All hat and no cattle” is an American expression used to describe someone who is all show and no substance. People also say “Big hat, no cattle.” “Hat” refers to the cowboy hat herders wear in the American West. The cowboy hats are big and showy hats with a wide circular edge. They make the cowboys look very impressive. And in the frontier days, if people wore cowboy hats but were not seen riding horses and had no cattle to own and herd, they were described negatively as all hat and no cattle. To put it in a dog idiom, we can say “all bark and no bite.”