Any time I see “[Whatever]-splaining” used by someone to dismiss an argument, I know the person using the term is really saying, “I don’t have an argument, and I just don’t want to listen, so I’ll use this nonsense term instead of putting my fingers in my ears and chanting, ‘na-na-na-na. . .’ and maybe the horrible person using facts and reason will just go away and leave me with my chosen, ignorant opinions.”
At that point, I realize that the only proper response is raucous mocking.