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When a guy gives into a girls demands/opinions because they are dating her, and don't want to face the consequences later of if they don't agree with her.

Similar to whipped.
Guy: Lets go see Movie A, I really like how it sounds.
Guy 2: Ya, that sounds awesome!
Girl: No, I want to watch this movie instead.
Guy: Fine, we'll see movie B.
Guy 2: Dude, you just got girlfriendified.
by GuelphTimes November 26, 2010