talk through one's hat
verb
Forms talks through one's hat talking through one's hat talked through one's hat
- verb (idiomatic) To speak lacking expertise, authority, or knowledge; to invent or fabricate facts.
- verb (idiomatic) To assert something as true or valid; to bluff.
Synonyms
Etymology
Attested from the late 19th century in the United States in the sense of “bluff”; the sense “speak without authority or knowledge” developed later. Although some people speculate a connection to a former requirement that British Members of Parliament wear hats, the connection is implausible.
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “talk through one's hat”, CC BY-SA 4.0. Details