A Russian expression for a person who can handle stress and conflict. To understand this, think about the negative: someone who can't handle conflict and gets the shits when in difficult situations.
Karen totally faced her boss in the meeting today. He is a notorious bully, but she has a concrete asshole.
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