This stands for Calm The Fuck Down.
Examples of this method in action:
Baby wakes up early from a nap? I need to CALM THE FUCK DOWN
Baby won’t take her bottle? I need to CALM THE FUCK DOWN
Baby only wants to be carried and will cry bloody murder if she’s put down? I need to CALM THE FUCK DOWN.
All things that have happened to me today, by the by. And I have NOT calmed the fuck down.