he won, hands down

Saying he won, hands down means to say someone has won matter-of-factly which has been proven and there is no way or reason to deny this fact. Hands down refers to the completeness at which someone has won, whether spoken literally such as a competition or figuratively like in the case of winning an argument or solving a dilemma. When you say someone won, hands down, it shows there is no doubt as to who won.