Being used or under the control of a girl or girlfriend by the use of her vag. Sometimes men will get vagcepted by a girlfriend and lose site of there true friends, mainly there bros, and think its love or are in love.
Colin: "Yo what ever happened to our friend Jim, I havent seen him in years?"
Ryan: "O man you didn't hear, he has a bad case of vagception."
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi