all hat and no cattle

Etymology
In reference to cattle ranchers and the hats they stereotypically wear; also derives from people wearing cowboy hats as fashion, but who are not actually cowboys, i.e., a poser, or a pretentious and phony individual.

Adjective

 * 1)  Full of big talk but lacking action, power, or substance; pretentious.
 * 2) * 1980, Patricia Calvert, The Snowbird, Scribner, ISBN 0684167190, page 29,
 * A fortune can be made on the prairie, and that's what me and Mr. B aim to do. Don't aim to be all hat and no cattle forever, let me tell you!
 * 1) * c. 1982, Paul W. Cronin, quoted in Thomas E. Mann and Norman J. Ornstein (Eds.), The American Elections of 1982, American Enterprise Institute for Public Policy Research (1983), ISBN 0844735310, page 82,
 * They provided a lot of talk, what Texans refer to as “all hat and no cattle.”
 * 1) * 1985, Regis MacKenna, The Regis Touch: Million-Dollar Advice from America’s Top Marketing Consultant, Addison-Wesley Longman, Incorporated, ISBN 0201139812, page 27,
 * There’s an old Texas saying about a cowboy who was “all hat and no cattle.” That is, he was all show and no substance.
 * 1) * 1998, Buffy the Vampire Slayer, "I Only Have Eyes for You" (roughly 24.5 minutes in):
 * Drusilla: It's time, Angel. She's ready for you now, she's dancing, dancing with death.
 * Spike: Big deal, he won't do anything. Our man Angel here likes to talk, but he's not much for action. All hat and no cattle.
 * 1) * 1999, Randy Newman, "Big Hat, No Cattle", from the album Bad Love, ASIN B00000J7R4, Uses variation of idiom in refrain:
 * "Big Hat, no cattle / Big head, no brain / Big snake, no rattle".
 * 1) * 2001, Janis L. Edwards, "Running in the Shadows in Campaign 2000: Candidate Metaphors in Editorial Cartoons", in American Behavioral Scientist, Volume 44 Issue 12, page 2142,
 * We expect a leader to be effective in his job, not just a public relations artist who is "all hat and no cattle."
 * 1) * 2007, John Saul, "Freewheeling", in Call It Tender, Salt Publishing, ISBN 1844713229, page 31,
 * She slapped my backside. Yew ol’ cowpoke.
 * I’m a cowpoke?
 * Yew certainly are. All hat and no cattle.

Synonyms

 * ; all bluff and bluster; all booster, no payload; all crown, no filling; all foam, no beer; all hammer, no nail; all icing, no cake; all lime and salt, no tequila; all mouth and no trousers; all mouth and trousers; all shot, no powder; all sizzle and no steak; all talk; all talk and no action; all wax and no wick; all motion and no meat; all show, no go; all fur coat and no knickers; all retch and no vomit; all fart and no poo.