Being deliberately or intentionally insensitive or neglectful. Can include a non-action or underwhelmed reaction that could be interpreted as a jab to another fueled by one's own jealousy (i.e. a nonchalant "diss" towards someone else's fortune).
Example of an accusation of cold-forking: "Why did you ignore the picture I sent of my new girlfriend and I? I saw you got it."
by tabintoeth April 15, 2018