A mind game where the objective is to avoid thinking about "The Game", and by thinking about it one loses, and subsequently has to announce one's loss to the world in order to make them lose.
You just lost The Game.
Wiktionary
The-game Sentence Examples
Exhaustion eventually ended the game and everyone but Dulce gathered in the kitchen for an ice cream snack.
Quinn, sensing his wife's discomfort, changed the subject back to the game.
Betsy was thrilled to lead the game.
And delight of delights; there's a pretty young girl in the game!
He smiled to himself, enjoying the game they always played.