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.
A verb that describes what happens to the game of footballwhen the "Tuck Rule," a.k.a. the "Tom Brady Rule," is applied to a play that is clearly a fumble.
Don't emasculate the game by giving in to the whiny complaints employed by fans of that pussy Tom Brady!
A man missing his mojo. Very closely related to the metrosexual, although he is probably not so well groomed and probably doesn't know who Jennifer Hudson is. Tends to be pussy whipped.
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 timeprocessing it).