1. verb In animation, to increase the space between the frames of an animated object to indicate its acceleration. Also referred to as "easing out." Remember to slow out when you animate something beginning to move. The more frames you include, the smoother the movement will appear.
2. noun An instance of such a technique. Often hyphenated. We stretch the character slightly during the slow-out to indicate the force of the sudden acceleration.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.