Definitions for "Inside-Out"
An Inside-Out Forehand is to run around the ball to take it on your forehand, even though it has been hit to you in a natural backhand position. An Inside-Out Backhand is the exact opposite.
running around one side (e.g. the backhand side) and hitting a crosscourt shot
a swing path that travels from inside (As above) the target line to outside the target line. Example: "If the clubface is square to the target line at impact an inside-out swing, or path, will result in a draw or a hook."
Flow of product from inside to outside of element.
Swing path that travels from inside (closer to the body than) the target line to outside (farther away from the body than) the target line.