the.com/double bluff

Telling the truth so convincingly no one believes you actually did.

means A deceptive move in which you say the real truth (or make the obvious move) betting that others expect deception and will disbelieve or second-guess it.

from Built from two older words: 'bluff' entered English in the 1800s from Dutch 'bluffen' (to boast or brag) or related Dutch/German roots meaning to deceive, and was adopted into poker slang for betting big on a weak hand to scare opponents off. 'Double' was added, likely from card and game strategy circles, to describe the next-level twist — bluffing about your bluff, or going straight when everyone expects a trick. It's not a single ancient coinage but a layered bit of gaming jargon that escaped into everyday language for any plan built on being too clever to be believed.

origin
Poker and espionage share the credit
mechanism
Exploits the expectation that bluffers lie about lying
risk
Fails instantly against someone equally paranoid
real use
Spies call it the double cross's smarter cousin
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