What does ‘Wing It’ mean?

Example: “Did you study for the test?” “No, I’m just going to wing it.”

Definition: Improvise

Explanation: Theatre people first used the phrase “wing it” as a way to describe someone who did not have the words of a play memorized well before performing it. The person would sit in the wings of the theater, just to the side of the stage, and try to memorize as many lines as they could right before performing.