Trivializing the category of womanhood isn't the same thing as indicating to a woman that she doesn't measure up to the picture of femininity. When a woman emasculates a male, she isn't trivializing masculinity. She is telling him he doesn't match up categorically. You could say that a man exogynates a woman when he does the same thing to her. It's not a term I think will catch any time soon. I just prefer to say that you 'shame them'.