tacofredag
A concept in Norway, where the nuclear family eats tacos every Friday because why not. And the why not elaborated into a tradition, every Norwegian have heard the word "tacofredag" at least once in their life.
Person A: "Bror, hva skal du ha til middag?"
Person B:"Det er fredag, tacofredag!!"
Person B:"Det er fredag, tacofredag!!"