foot loose and fancy free

Foot loose and fancy free is an old idiom which is referring to the fact that someone who is not married or does not have many responsibilities can do what they want, when they want and come and go as they please. Whether because this person is young and inexperienced, doesnt have responsibilities yet or is single and living a fun free life, the phrase foot loose and fancy free is speaking of someone who enjoys doing what they want without answering to anyone.