role reversal

1. N-VAR Role reversal is a situation in which two people have chosen or been forced to exchange their duties and responsibilities, so that each is now doing what the other used to do. 角色互換; 角色對調

...men who have undertaken the most extreme role reversal and become house husbands. ...那些進行了最極耑的角色對調而成爲家庭主夫的男人。