To betray or "cross" someone who is an aspiring young professional (e.g. lawyer, physician).
She canceled our dinner date because she felt ill; yet I saw her out at the bars later that evening. If she decussates me again, I am going to unfollow her on instagram.
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