быть в своём уме(To have the full faculties of one's mind; to be completely sane. Usually used in negative constructions. • She looks like she's not playing with a full deck.joyand)
действовать в здравом уме(To have the full faculties of one's mind; to be completely sane. Usually used in negative constructions. • A: "Look at that guy talking to himself on the corner." B: He must not be playing with a full deck." • I know you don't think I'm playing with a full deck, but I'm telling you the truth—a ghost came through the window and stole my briefcase!Interex)