To have been rendered less of a man, or been made to feel much less of a man through humiliation. This term is most often used to describe a male douchebag who has been pussywhipped by his woman.
The fact that lame Ed has chosen to neglect his friends and be home before midnight on a Friday night is proof that he has allowed himself to become completely emasculated by his girlfriend.
To release generous amounts of divinely aqueous Yin essence from the vagina during sex. Also known as "Squirting" or "Female Ejaculation" (crude terms to describe a sacred experience), Femaculation is an immaculate expression of feminine sexual vitality and juicyness.
Last night while I was riding my lover, I reached such a state of ecstatic bliss that I femaculated all over him and soaked the sheets with love essence from my yoni. It was totally amazing!
As masculine as some females have gotten, soon you will have females claiming that if guys are going to talk about people emasculating them, I'm going to talk about people emasculating me (though society doesn't really try to make guys less feminine or females less masculine, even if they have a hard time processing it).
It's hard for a female to get emasculated, but some would try and find a way.