tinfoil hatter
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
A person who believes in or propagates conspiracy theories; a conspiracy theorist.
Register: derogatory, slang
Where it’s used:
Used
American English
Examples
The Washington State Dental Association is backing his $300,000 pro-fluoride campaign. Danelle Weaver and her friends, meanwhile, have raised less than $10,000. But they are undaunted. "People think we are tinfoil hatters," says Weaver, "but we're just average families who take the time to research
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “tinfoil hatter” mean?
A person who believes in or propagates conspiracy theories; a conspiracy theorist.
Is “tinfoil hatter” formal or informal?
tinfoil hatter is generally derogatory, slang.