Another way of saying "go with the flow." Usually used when there's no set plans and everything furthermore will be done when it's done (or spontaneously).
Guy 1: "what are the plans for tomorrow night? Any parties?"
Guy 2: "idk, guess we'll just play it by ear."
Guy 2: "idk, guess we'll just play it by ear."
by GMan2a January 03, 2016