It essentially means that something is the same thing. The two things you're talking about are really similar.
Tom: "Hey we can either rent a Ford Taurus, or a Mercury Sable."
Eric: "well 6 of 1, half dozen of another."
Eric: "well 6 of 1, half dozen of another."
by quebert September 14, 2007
used when someone asks you to do something you don't have time to do. typically used when you are in the middle of planning a large project, or are otherwise really busy.
by quebert September 13, 2007