A German woman, while arguing in Moroccan dialect with another woman, was told: “We Muslims do so and so, why don’t you do that?” She replied, “Yalla, I am a kafir,” meaning “just dare to call me kafir!” as she had understood from Moroccan dialect that the real meaning is not intended. Is this kufr?

Ustadh AbdulAziz al-Haqqan

No, but this is unwise to say. For the questioner, I advise you not to fall into compulsive thoughts (waswas).